A259768 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000101.

201, 299, 385, 451, 474, 835, 872, 968, 1532, 1794, 2116, 2746, 4218, 4546, 5038, 8578, 9510, 10852, 15782, 21068, 23626, 28628, 45684, 49942, 56506, 89228, 107618, 121770, 163652, 236042, 261164, 308318, 487320, 557176, 632898, 928294, 1212250

Offset

1,1

Comments

Column 4 of A259770

Links

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

Formula

Empirical: a(n) = 3*a(n-7) +5*a(n-10) +a(n-13) -a(n-14) -a(n-17) -2*a(n-21) for n>24

Example

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

Crossrefs

Cf. A259770

Sequence in context: A338591 A347887 A353081 * A076192 A157956 A202771

Adjacent sequences: A259765 A259766 A259767 * A259769 A259770 A259771

Keyword

nonn

Author

R. H. Hardin, Jul 04 2015

Status

approved