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A223603 Petersen graph (8,2) coloring a rectangular array: number of 5Xn 0..15 arrays where 0..15 label nodes of a graph with edges 0,1 0,8 8,14 8,10 1,2 1,9 9,15 9,11 2,3 2,10 10,12 3,4 3,11 11,13 4,5 4,12 12,14 5,6 5,13 13,15 6,7 6,14 7,0 7,15 and every array movement to a horizontal, diagonal or antidiagonal neighbor moves along an edge of this graph 1
1048576, 40160, 1931968, 47659632, 1807461152, 63079247600, 2400064408240, 90938609732144, 3502184025729312, 135060601994290512, 5225267725656119568, 202291946619229066288, 7836871271932729361344, 303667249235629519756208 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 5 of A223599

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 53*a(n-1) +374*a(n-2) -49281*a(n-3) +168337*a(n-4) +18953770*a(n-5) -135592765*a(n-6) -4018506722*a(n-7) +38351948598*a(n-8) +526425355509*a(n-9) -6247995788825*a(n-10) -44696544056917*a(n-11) +672018817036164*a(n-12) +2439625095672568*a(n-13) -51015250910957358*a(n-14) -74076479025445048*a(n-15) +2845371514245940944*a(n-16) -101151111776030008*a(n-17) -119745692885750334784*a(n-18) +136753869468449758704*a(n-19) +3872580812719758794448*a(n-20) -7900336393914849682208*a(n-21) -97415736700690808391520*a(n-22) +277181005424624672989888*a(n-23) +1918607026870809036988608*a(n-24) -7018687605134326176007808*a(n-25) -29583813723962062148089344*a(n-26) +136135267638358734615001088*a(n-27) +353449062429138527697512448*a(n-28) -2082673221451996449548128256*a(n-29) -3167294004420980789940391936*a(n-30) +25561447594742343434919616512*a(n-31) +19220624893813686502281330688*a(n-32) -254363255978716849635741302784*a(n-33) -43077889432320253843386531840*a(n-34) +2065610230705196722136007311360*a(n-35) -611869355376433765635530162176*a(n-36) -13735449605624441628196649566208*a(n-37) +9470460446052194237483947393024*a(n-38) +74832374656222369766059121049600*a(n-39) -78103053092167370004491719933952*a(n-40) -333196375373544832413565391470592*a(n-41) +462823435221855922222719588892672*a(n-42) +1204538345581769309443391701909504*a(n-43) -2121446352517105569942230355935232*a(n-44) -3489686115260065017811788294520832*a(n-45) +7736167933674865795576682917134336*a(n-46) +7896874136363657884330039883857920*a(n-47) -22708246137511575464946240959021056*a(n-48) -13177852194558039676440426361913344*a(n-49) +53846250174111770796979059918110720*a(n-50) +13519966957331356540752962533720064*a(n-51) -102966371980750600298466431733858304*a(n-52) +721316744394990987103801704448000*a(n-53) +157810807625828720650178914919907328*a(n-54) -34553697631065369192975193234997248*a(n-55) -191773787737447411912344991317360640*a(n-56) +77241888800091488728842956353568768*a(n-57) +181702526658392297572436797007331328*a(n-58) -104412959969421829864586835157581824*a(n-59) -130784502166988791077582920256323584*a(n-60) +98708628283267583534162228587528192*a(n-61) +68486312638776842376465639324778496*a(n-62) -67167764609290716861288017595203584*a(n-63) -23962558422689391133337137627267072*a(n-64) +32616881131758874199190445116882944*a(n-65) +4355396983589155226858169397411840*a(n-66) -10925261504311980936490504777891840*a(n-67) +244984704106217968259546474348544*a(n-68) +2362788076708829828961015586357248*a(n-69) -317326938329004163267124457897984*a(n-70) -290183829846002617980829418127360*a(n-71) +62205167167105726405236668497920*a(n-72) +14789431793187428965929713664000*a(n-73) -3965881151245791007623610368000*a(n-74) for n>75

EXAMPLE

Some solutions for n=3

..0..8..0....4.12.10....4.12..4....4.12..4....4.12.14...12..4.12....4.12.10

.10..8..0....4.12..4...10.12.10....4..5..4...14.12.10...12..4.12...10.12.14

.10..8.10...10.12.10...10.12..4....4..5..6...14.12..4....3..4..5...14.12.14

..0..8.14...14.12..4....4.12.14...13..5..6...14.12.10....5..4..5...10.12.10

.14..8..0...10.12.10...10.12.10....6..5..4...14.12.10....5..4..5...14.12.10

CROSSREFS

Sequence in context: A011570 A022536 A069395 * A223696 A069281 A224804

Adjacent sequences: A223600 A223601 A223602 * A223604 A223605 A223606

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 23 2013

STATUS

approved

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Last modified February 8 23:03 EST 2023. Contains 360153 sequences. (Running on oeis4.)