The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A298926 Number of n X 4 0..1 arrays with every element equal to 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero. 1
 0, 2, 4, 11, 23, 72, 201, 597, 1717, 5183, 15479, 46260, 138928, 417427, 1255369, 3777004, 11372190, 34247960, 103164581, 310821235, 936579808, 2822417917, 8506019597, 25636254701, 77267796877, 232891865309, 701970354408 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Column 4 of A298930. LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 6*a(n-1) -10*a(n-2) +7*a(n-3) -23*a(n-4) +31*a(n-5) -15*a(n-6) +104*a(n-7) -147*a(n-8) +182*a(n-9) -366*a(n-10) +376*a(n-11) -685*a(n-12) +689*a(n-13) -613*a(n-14) +1143*a(n-15) -710*a(n-16) -129*a(n-17) -82*a(n-18) -584*a(n-19) +5620*a(n-20) -1356*a(n-21) +6298*a(n-22) -15575*a(n-23) +6568*a(n-24) -15985*a(n-25) +6661*a(n-26) -23488*a(n-27) +19556*a(n-28) +16109*a(n-29) +18333*a(n-30) +8059*a(n-31) -12197*a(n-32) +16533*a(n-33) -27875*a(n-34) -8576*a(n-35) -28209*a(n-36) +16299*a(n-37) +26487*a(n-38) +4040*a(n-39) -22226*a(n-40) +1134*a(n-41) -9128*a(n-42) -7294*a(n-43) +16692*a(n-44) +6504*a(n-45) +1137*a(n-46) -5253*a(n-47) +2127*a(n-48) -324*a(n-49) +1885*a(n-50) -1689*a(n-51) -59*a(n-52) -235*a(n-53) +346*a(n-54) -86*a(n-55) +12*a(n-56) -46*a(n-57) +24*a(n-58) +8*a(n-59) -4*a(n-60) for n>61. EXAMPLE Some solutions for n=5 ..0..0..1..1. .0..0..0..0. .0..0..0..0. .0..0..1..1. .0..0..0..0 ..0..1..0..1. .0..1..1..0. .0..0..0..0. .0..1..0..1. .0..1..1..0 ..1..1..0..1. .1..0..1..0. .0..0..0..0. .0..1..0..1. .0..1..0..1 ..0..1..0..1. .1..0..1..0. .1..1..1..1. .1..0..0..1. .1..0..0..1 ..0..0..1..1. .1..1..0..0. .1..1..1..1. .1..1..1..1. .1..1..1..1 CROSSREFS Cf. A298930. Sequence in context: A006452 A104430 A298255 * A292157 A256801 A103669 Adjacent sequences: A298923 A298924 A298925 * A298927 A298928 A298929 KEYWORD nonn AUTHOR R. H. Hardin, Jan 29 2018 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 3 09:03 EST 2022. Contains 358515 sequences. (Running on oeis4.)