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A261377 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101. 1
154, 266, 869, 2282, 5633, 14312, 39494, 99168, 261501, 666722, 1785513, 4510376, 12029879, 30520850, 81445076, 206279050, 550615794, 1395355514, 3723483907, 9434612056, 25180483084, 63803504988, 170274449783, 431455039974 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A261380.

LINKS

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

FORMULA

Empirical: a(n) = 31*a(n-4) +97*a(n-6) +39*a(n-8) -144*a(n-10) -29*a(n-12) +189*a(n-14) -125*a(n-16) -14*a(n-18) +40*a(n-20) -13*a(n-22) -a(n-24) +a(n-26) for n>29

EXAMPLE

Some solutions for n=4

..1..0..1..0..1..0..0....0..0..0..1..0..1..0....1..0..1..0..1..0..1

..0..1..0..0..0..1..0....1..0..1..0..1..0..1....0..1..0..1..0..1..0

..1..0..1..0..1..0..1....0..1..0..1..0..0..0....1..0..1..0..1..0..1

..0..1..0..1..0..1..0....0..0..1..0..1..0..1....0..1..0..0..0..1..0

..0..0..1..0..1..0..0....0..1..0..1..0..1..0....1..0..1..0..1..0..0

..0..1..0..0..0..1..0....1..0..1..0..1..0..1....0..1..0..1..0..1..0

CROSSREFS

Cf. A261380.

Sequence in context: A327775 A053243 A320708 * A256024 A239564 A250626

Adjacent sequences:  A261374 A261375 A261376 * A261378 A261379 A261380

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 17 2015

STATUS

approved

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Last modified May 11 21:35 EDT 2021. Contains 343808 sequences. (Running on oeis4.)