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A316949 Number of nX4 0..1 arrays with every element unequal to 1, 2, 3, 4, 5, 6 or 7 king-move adjacent elements, with upper left element zero. 1
2, 98, 1240, 18956, 287292, 4335826, 65510494, 989703110, 14951804382, 225883580652, 3412521523118, 51554446712590, 778855465200848, 11766508452169318, 177761763728514408, 2685524323129042060 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A316953.
LINKS
FORMULA
Empirical: a(n) = 12*a(n-1) +38*a(n-2) +130*a(n-3) +69*a(n-4) +144*a(n-5) -193*a(n-6) -26*a(n-7) -60*a(n-8) +166*a(n-9) -97*a(n-10) +44*a(n-11) -44*a(n-12) +16*a(n-13)
EXAMPLE
Some solutions for n=5
..0..0..0..0. .0..0..0..1. .0..0..1..0. .0..0..1..0. .0..0..1..0
..0..1..1..0. .0..1..1..0. .1..0..0..1. .0..1..1..1. .0..1..0..0
..0..0..0..1. .1..1..0..0. .0..1..1..0. .0..1..0..1. .0..1..0..1
..1..0..0..1. .0..1..0..0. .0..1..0..0. .1..0..0..0. .0..0..1..1
..0..0..0..0. .1..0..1..0. .1..0..1..0. .1..1..1..0. .1..0..0..1
CROSSREFS
Cf. A316953.
Sequence in context: A053997 A305688 A317068 * A317729 A223038 A324266
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 17 2018
STATUS
approved

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)