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A260836 Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101 1
188, 288, 700, 1224, 1560, 3470, 6908, 10070, 18716, 39478, 64940, 111162, 228324, 409632, 690964, 1345662, 2532216, 4354216, 8095220, 15462342, 27373920, 49529004, 94027168, 170716994, 306172260, 572849570, 1056328308, 1900057106 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A260841

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-3) +6*a(n-4) -9*a(n-6) -16*a(n-7) -10*a(n-8) +4*a(n-9) +7*a(n-10) +6*a(n-12) +8*a(n-14) +10*a(n-15) +2*a(n-16) +4*a(n-17) +4*a(n-19) +3*a(n-20) +2*a(n-22) for n>24

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260841

Sequence in context: A044998 A243077 A186397 * A304279 A099945 A211814

Adjacent sequences:  A260833 A260834 A260835 * A260837 A260838 A260839

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 01 2015

STATUS

approved

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Last modified October 22 05:36 EDT 2021. Contains 348160 sequences. (Running on oeis4.)