A260281 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 00000001 or 00001011

366, 1150, 5420, 18380, 65907, 264502, 984644, 3594132, 13692107, 51665854, 191960166, 721121125, 2715359102, 10162545149, 38093817256, 143095709741, 536645505853, 2012038271487, 7550226421387, 28325095890229, 106233154740268

Offset

1,1

Comments

Column 5 of A260284

Links

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

Formula

Empirical: a(n) = a(n-1) +46*a(n-3) +17*a(n-4) +19*a(n-5) -610*a(n-6) -622*a(n-7) -284*a(n-8) +4212*a(n-9) +5180*a(n-10) +2340*a(n-11) -17624*a(n-12) -21340*a(n-13) -7070*a(n-14) +43074*a(n-15) +46818*a(n-16) +15958*a(n-17) -63936*a(n-18) -61960*a(n-19) -21872*a(n-20) +58810*a(n-21) +49015*a(n-22) +18583*a(n-23) -36041*a(n-24) -22661*a(n-25) -7530*a(n-26) +15022*a(n-27) +6519*a(n-28) +681*a(n-29) -4941*a(n-30) -1301*a(n-31) +242*a(n-32) +1190*a(n-33) +261*a(n-34) -35*a(n-35) -145*a(n-36) -23*a(n-37) +8*a(n-39) for n>44

Example

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

Crossrefs

Cf. A260284

Sequence in context: A033174 A350471 A249704 * A325847 A279982 A286793

Adjacent sequences: A260278 A260279 A260280 * A260282 A260283 A260284

Keyword

nonn

Author

R. H. Hardin, Jul 22 2015

Status

approved