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A296683 Number of n X 3 0..1 arrays with each 1 adjacent to 1, 2 or 3 king-move neighboring 1s. 1
4, 43, 210, 1162, 6959, 39608, 226599, 1305725, 7497482, 43051551, 247361324, 1420935204, 8162170909, 46887717710, 269343435641, 1547219822419, 8887903925214, 51055949141455, 293287243303968, 1684768052870030 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A296688.
LINKS
FORMULA
Empirical: a(n) = 4*a(n-1) + 4*a(n-2) + 37*a(n-3) - 15*a(n-4) + 21*a(n-5) - 79*a(n-6) - 7*a(n-7) - 92*a(n-8) - 49*a(n-9) - 19*a(n-10) - 20*a(n-11) + 2*a(n-12).
Empirical formula verified by Robert Israel, Dec 18 2017: see link.
EXAMPLE
Some solutions for n=6:
0 0 1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 0 0 0 1 1 0 0 0 0 0 0 0 1 0 1 1 0 1 1
0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 1 0
1 0 1 1 0 0 1 1 0 0 0 0 1 0 0 0 1 1 0 0 1
1 0 1 0 1 0 0 0 1 0 0 1 0 0 0 1 0 1 1 1 0
0 1 1 0 0 1 0 0 0 1 1 0 1 1 0 1 0 0 0 0 0
CROSSREFS
Cf. A296688.
Sequence in context: A200000 A198209 A220774 * A297649 A186678 A186768
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 18 2017
STATUS
approved

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Last modified June 15 19:43 EDT 2024. Contains 373410 sequences. (Running on oeis4.)