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A260540 Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001 1
337, 566, 1411, 2775, 4398, 10949, 22212, 38389, 86646, 186223, 333028, 690553, 1521828, 2869799, 5631896, 12249267, 24273164, 46855557, 98826636, 201859033, 392337270, 804788515, 1662271148, 3279380771, 6610407134, 13637789673 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A260544

LINKS

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

FORMULA

Empirical: a(n) = a(n-2) +7*a(n-3) +8*a(n-4) -6*a(n-5) -19*a(n-6) -23*a(n-7) -13*a(n-8) +32*a(n-9) +51*a(n-10) -4*a(n-11) +13*a(n-12) -6*a(n-13) -50*a(n-14) -28*a(n-15) -34*a(n-16) -20*a(n-17) +a(n-18) +8*a(n-19) +23*a(n-20) -3*a(n-21) +12*a(n-22) +10*a(n-23) -12*a(n-24) +7*a(n-25) -2*a(n-27) for n>31

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A260544

Sequence in context: A273529 A153164 A020358 * A051962 A214492 A157999

Adjacent sequences:  A260537 A260538 A260539 * A260541 A260542 A260543

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 28 2015

STATUS

approved

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Last modified May 13 11:17 EDT 2021. Contains 343839 sequences. (Running on oeis4.)