A260924 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101

297, 468, 1800, 4522, 11608, 27582, 82766, 191474, 543551, 1291912, 3724868, 8715812, 25061915, 59060378, 169750208, 398939434, 1147482231, 2699112784, 7759824787, 18248954340, 52477167246, 123413127854, 354855957210

Offset

1,1

Comments

Column 5 of A260927

Links

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

Formula

Empirical: a(n) = a(n-1) +31*a(n-4) -31*a(n-5) +97*a(n-6) -97*a(n-7) +39*a(n-8) -39*a(n-9) -144*a(n-10) +144*a(n-11) -29*a(n-12) +29*a(n-13) +189*a(n-14) -189*a(n-15) -125*a(n-16) +125*a(n-17) -14*a(n-18) +14*a(n-19) +40*a(n-20) -40*a(n-21) -13*a(n-22) +13*a(n-23) -a(n-24) +a(n-25) +a(n-26) -a(n-27) for n>28

Example

Some solutions for n=4
..0..0..1..0..0..0..1....1..0..0..0..1..0..1....1..0..1..0..1..1..0
..0..0..0..1..0..1..0....0..1..0..1..0..1..0....0..1..0..1..0..0..0
..1..0..1..0..1..0..1....1..0..1..0..1..0..1....1..0..1..0..1..0..1
..0..1..0..1..0..1..0....0..1..0..1..0..1..0....0..0..0..1..0..1..0
..0..0..1..0..1..0..1....1..0..1..0..1..0..0....1..0..1..0..1..0..1
..1..1..0..1..0..1..0....0..1..0..0..0..1..0....0..1..0..1..0..0..0

Crossrefs

Cf. A260927

Sequence in context: A224601 A372249 A134260 * A053394 A179158 A037043

Adjacent sequences: A260921 A260922 A260923 * A260925 A260926 A260927

Keyword

nonn

Author

R. H. Hardin, Aug 04 2015

Status

approved