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A259639 Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000000 or 00000001 1
236, 813, 3849, 12348, 44500, 182654, 670088, 2436036, 9361060, 35240824, 130549550, 491638762, 1851623400, 6921303290, 25956767494, 97538420980, 365652086782, 1370955967484, 5145436930220, 19301728914022, 72388123438246 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A259642
LINKS
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +33*a(n-3) +20*a(n-4) -18*a(n-5) -257*a(n-6) -260*a(n-7) -44*a(n-8) +912*a(n-9) +798*a(n-10) +241*a(n-11) -1094*a(n-12) -868*a(n-13) -450*a(n-14) +667*a(n-15) +251*a(n-16) +158*a(n-17) -247*a(n-18) -19*a(n-19) +25*a(n-20) +81*a(n-21) +7*a(n-22) -8*a(n-24) for n>25
EXAMPLE
Some solutions for n=4
..0..0..0..0..0..0..0....1..0..0..1..0..0..1....0..0..0..0..0..1..0
..0..0..0..1..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..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..1..0....0..0..1..0..0..0..1....0..0..0..0..0..1..0
..0..1..0..0..0..0..0....0..0..0..0..0..0..0....0..1..0..0..0..0..0
CROSSREFS
Sequence in context: A138818 A138819 A273181 * A334649 A233983 A251491
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 02 2015
STATUS
approved

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Last modified February 29 20:48 EST 2024. Contains 370428 sequences. (Running on oeis4.)