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A207842 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 0 and 1 1 1 vertically 1
16, 256, 432, 2320, 10144, 41444, 185136, 813824, 3485460, 15230748, 66498048, 288260144, 1254699732, 5464724040, 23754515904, 103342176624, 449732042272, 1956188201356, 8510004040560, 37025612095680, 161072178927292 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A207845
LINKS
FORMULA
Empirical: a(n) = 3*a(n-2) +48*a(n-3) +76*a(n-4) +109*a(n-5) -87*a(n-6) -231*a(n-7) -212*a(n-8) -604*a(n-9) -224*a(n-10) -993*a(n-11) +224*a(n-12) -604*a(n-13) +212*a(n-14) -231*a(n-15) +87*a(n-16) +109*a(n-17) -76*a(n-18) +48*a(n-19) -3*a(n-20) +a(n-22) for n>24
EXAMPLE
Some solutions for n=4
..0..1..0..1..1....1..0..1..0..1....1..0..1..0..0....0..1..0..1..0
..1..0..1..0..0....0..1..0..1..1....0..1..0..1..1....0..1..0..1..1
..0..1..1..1..0....0..1..0..1..0....1..1..1..1..1....1..0..1..0..0
..0..1..0..1..1....1..0..1..0..1....1..0..1..0..0....0..1..0..1..0
CROSSREFS
Sequence in context: A207586 A208071 A206984 * A135554 A208376 A208066
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 21 2012
STATUS
approved

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Last modified May 23 22:02 EDT 2024. Contains 372765 sequences. (Running on oeis4.)