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A260922 Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101 1
104, 146, 401, 896, 1800, 3358, 7680, 14924, 32431, 62992, 139263, 269060, 591945, 1148020, 2528065, 4893596, 10776857, 20877196, 45968189, 89026604, 196045769, 379710316, 836112021, 1619399516, 3565959873, 6906609340, 15208409269 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A260927

LINKS

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

FORMULA

Empirical: a(n) = a(n-2) +11*a(n-4) +13*a(n-6) -2*a(n-8) -2*a(n-10) +4*a(n-12) for n>15

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260927

Sequence in context: A052476 A297912 A253700 * A054903 A074228 A298505

Adjacent sequences:  A260919 A260920 A260921 * A260923 A260924 A260925

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 04 2015

STATUS

approved

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Last modified March 7 13:24 EST 2021. Contains 341886 sequences. (Running on oeis4.)