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A260367 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111 1
616, 896, 2532, 5326, 6144, 15440, 37948, 52390, 101664, 257566, 426880, 725994, 1725912, 3274678, 5445516, 11736246, 23960256, 41364302, 81988816, 171038604, 310817940, 587494972, 1211225620, 2298124782, 4275996700, 8598088978 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A260370

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-3) +19*a(n-4) -18*a(n-6) -124*a(n-7) -163*a(n-8) +10*a(n-9) +252*a(n-10) +864*a(n-11) +879*a(n-12) -174*a(n-13) -1591*a(n-14) -3680*a(n-15) -3315*a(n-16) +1266*a(n-17) +6073*a(n-18) +10814*a(n-19) +9133*a(n-20) -5114*a(n-21) -15884*a(n-22) -23402*a(n-23) -19214*a(n-24) +13236*a(n-25) +30495*a(n-26) +38782*a(n-27) +32769*a(n-28) -23424*a(n-29) -45619*a(n-30) -49722*a(n-31) -47865*a(n-32) +30226*a(n-33) +55237*a(n-34) +48214*a(n-35) +60530*a(n-36) -30888*a(n-37) -53980*a(n-38) -34404*a(n-39) -61349*a(n-40) +24766*a(n-41) +39056*a(n-42) +18624*a(n-43) +46236*a(n-44) -13648*a(n-45) -19198*a(n-46) -7988*a(n-47) -24471*a(n-48) +4392*a(n-49) +6110*a(n-50) +2386*a(n-51) +8570*a(n-52) -662*a(n-53) -1089*a(n-54) -306*a(n-55) -1825*a(n-56) -6*a(n-57) +60*a(n-58) -24*a(n-59) +201*a(n-60) +8*a(n-61) +3*a(n-62) +6*a(n-63) -8*a(n-64) for n>66

EXAMPLE

Some solutions for n=4

..0..1..1..1..0..0..0....1..0..0..1..1..1..0....0..1..0..0..0..0..0

..0..0..0..1..0..0..1....0..0..0..0..0..1..0....0..0..0..0..1..1..0

..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0

..1..0..0..0..0..0..0....0..0..1..0..0..0..0....1..1..0..0..0..0..0

..0..0..0..1..0..0..1....0..0..1..0..0..1..0....1..0..0..0..1..0..0

..0..0..0..1..1..1..1....0..0..0..0..0..0..1....1..0..0..0..1..1..1

CROSSREFS

Cf. A260370

Sequence in context: A268102 A190029 A252252 * A218847 A219426 A297319

Adjacent sequences:  A260364 A260365 A260366 * A260368 A260369 A260370

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 23 2015

STATUS

approved

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Last modified September 19 00:22 EDT 2021. Contains 347549 sequences. (Running on oeis4.)