A259639 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001

236, 813, 3849, 12348, 44500, 182654, 670088, 2436036, 9361060, 35240824, 130549550, 491638762, 1851623400, 6921303290, 25956767494, 97538420980, 365652086782, 1370955967484, 5145436930220, 19301728914022, 72388123438246

Offset

1,1

Comments

Column 5 of A259642

Links

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

Formula

Empirical: a(n) = a(n-1) +2*a(n-2) +33*a(n-3) +20*a(n-4) -18*a(n-5) -257*a(n-6) -260*a(n-7) -44*a(n-8) +912*a(n-9) +798*a(n-10) +241*a(n-11) -1094*a(n-12) -868*a(n-13) -450*a(n-14) +667*a(n-15) +251*a(n-16) +158*a(n-17) -247*a(n-18) -19*a(n-19) +25*a(n-20) +81*a(n-21) +7*a(n-22) -8*a(n-24) for n>25

Example

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

Crossrefs

Cf. A259642

Sequence in context: A138818 A138819 A273181 * A334649 A233983 A251491

Adjacent sequences: A259636 A259637 A259638 * A259640 A259641 A259642

Keyword

nonn

Author

R. H. Hardin, Jul 02 2015

Status

approved