A261263 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101.

586, 758, 2948, 10382, 28540, 85506, 274100, 842884, 2548286, 7832046, 24162204, 74075530, 226969292, 697051096, 2140551114, 6567905552, 20155238082, 61868865174, 189897012544, 582806503534, 1788751262356, 5490189574614

Offset

1,1

Comments

Column 6 of A261265.

Links

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

Formula

Empirical: a(n) = a(n-1) +10*a(n-3) +17*a(n-4) +24*a(n-5) +32*a(n-6) +27*a(n-7) +9*a(n-8) -25*a(n-9) -42*a(n-10) +24*a(n-11) +115*a(n-12) +42*a(n-13) -51*a(n-14) -85*a(n-15) -105*a(n-16) +63*a(n-17) +187*a(n-18) -47*a(n-19) -169*a(n-20) +53*a(n-21) +83*a(n-22) -31*a(n-23) -7*a(n-24) +15*a(n-25) -19*a(n-26) +8*a(n-28) -5*a(n-29) +3*a(n-30) -a(n-31) for n>36

Example

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

Crossrefs

Cf. A261265.

Sequence in context: A171436 A020362 A051988 * A251476 A270424 A196888

Adjacent sequences: A261260 A261261 A261262 * A261264 A261265 A261266

Keyword

nonn

Author

R. H. Hardin, Aug 13 2015

Status

approved