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A260762 Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011 1
190, 265, 652, 1234, 1740, 3891, 8056, 12829, 24824, 52425, 91422, 166962, 342344, 633804, 1145464, 2263471, 4316958, 7882937, 15150302, 29161786, 54045826, 102292437, 196570918, 368716813, 693829414, 1326250831, 2505952054 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A260767

LINKS

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

FORMULA

Empirical: a(n) = 8*a(n-3) +9*a(n-4) +2*a(n-5) -20*a(n-6) -48*a(n-7) -45*a(n-8) +10*a(n-9) +76*a(n-10) +140*a(n-11) +104*a(n-12) -22*a(n-13) -126*a(n-14) -204*a(n-15) -136*a(n-16) +14*a(n-17) +105*a(n-18) +136*a(n-19) +91*a(n-20) -30*a(n-21) -44*a(n-22) -42*a(n-23) -10*a(n-24) +38*a(n-25) +18*a(n-26) +16*a(n-27) -9*a(n-28) -10*a(n-29) -3*a(n-30) -4*a(n-31) +3*a(n-32) for n>34

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A260767

Sequence in context: A025382 A179518 A186076 * A218292 A051979 A097647

Adjacent sequences:  A260759 A260760 A260761 * A260763 A260764 A260765

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 30 2015

STATUS

approved

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Last modified March 30 22:55 EDT 2020. Contains 333132 sequences. (Running on oeis4.)