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A298966 Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 king-move adjacent elements, with upper left element zero. 1
8, 128, 1575, 21098, 280468, 3740381, 49885231, 665351771, 8874346832, 118364863862, 1578735453349, 21056975599629, 280855308864195, 3746013029750793, 49963853976933385, 666411644915463676 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A298970.
LINKS
FORMULA
Empirical: a(n) = 13*a(n-1) +11*a(n-2) -67*a(n-3) -264*a(n-4) -64*a(n-5) +1260*a(n-6) +656*a(n-7) -3045*a(n-8) -3423*a(n-9) +5088*a(n-10) +9482*a(n-11) -514*a(n-12) -10331*a(n-13) -6164*a(n-14) +3337*a(n-15) +4293*a(n-16) +719*a(n-17) -809*a(n-18) +116*a(n-19) +149*a(n-20) -62*a(n-21) -160*a(n-22) -48*a(n-23)
EXAMPLE
Some solutions for n=5
..0..0..0..1. .0..0..0..1. .0..0..1..0. .0..0..0..1. .0..0..0..1
..1..0..1..1. .1..0..0..1. .0..1..1..1. .0..1..0..1. .0..1..1..1
..0..1..0..1. .0..1..1..0. .0..0..1..1. .1..0..1..0. .1..1..1..0
..0..0..1..1. .1..0..0..1. .0..0..1..0. .1..1..0..0. .1..0..0..0
..1..1..1..0. .1..0..0..1. .0..1..1..0. .1..1..0..1. .1..0..1..0
CROSSREFS
Cf. A298970.
Sequence in context: A305519 A316956 A036294 * A299736 A133680 A316811
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2018
STATUS
approved

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Last modified February 21 07:54 EST 2024. Contains 370219 sequences. (Running on oeis4.)