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A260014 Number of (n+2)X(7+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000101 00010101 or 01010101 1
1744, 6262, 56137, 292422, 1231648, 5674360, 33390411, 166527544, 840032861, 4030790792, 21851751619, 107051545804, 560817409385, 2718986093568, 14479118145265, 70576014066146, 372877924721591, 1812602181447164 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A260015

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-2) +517*a(n-4) -854*a(n-6) -56990*a(n-8) +56302*a(n-10) +2411527*a(n-12) -1764472*a(n-14) -48498069*a(n-16) +26093894*a(n-18) +497994124*a(n-20) -222182908*a(n-22) -2758508017*a(n-24) +1071537624*a(n-26) +8550609072*a(n-28) -2818367318*a(n-30) -15204425329*a(n-32) +4059654344*a(n-34) +15566932977*a(n-36) -3209525858*a(n-38) -8958017542*a(n-40) +1356965078*a(n-42) +2746526451*a(n-44) -272931138*a(n-46) -410312169*a(n-48) +21549240*a(n-50) +26177904*a(n-52) -653184*a(n-54) -559872*a(n-56) for n>57

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Cf. A260015

Sequence in context: A185942 A090837 A250466 * A190829 A038010 A324710

Adjacent sequences:  A260011 A260012 A260013 * A260015 A260016 A260017

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 13 2015

STATUS

approved

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Last modified September 23 20:42 EDT 2021. Contains 347617 sequences. (Running on oeis4.)