A260068 Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111

2131, 5776, 16344, 34917, 77061, 251582, 660896, 1470739, 4080236, 12463280, 30924518, 77105282, 228211895, 637935403, 1599037659, 4357701023, 12595214555, 33560728043, 87859868123, 246975122762, 686765810423, 1818066574783

Offset

1,1

Comments

Column 6 of A260070

Links

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

R. H. Hardin, Empirical recurrence of order 69

Formula

Appears to satisfy a recurrence of order 69 (see link above)

Example

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

Crossrefs

Cf. A260070

Sequence in context: A210271 A066817 A110024 * A237070 A157768 A067199

Adjacent sequences: A260065 A260066 A260067 * A260069 A260070 A260071

Keyword

nonn

Author

R. H. Hardin, Jul 14 2015

Status

approved