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A269763
Number of nX4 0..5 arrays with some element plus some horizontally or vertically adjacent neighbor totalling five exactly once.
1
450, 524160, 326697720, 170119348800, 81208264293720, 36821411380183680, 16136599337765506680, 6902518041829140001920, 2899610192068539725611800, 1201070898923243105905234560, 491952252969600904794435746040
OFFSET
1,1
COMMENTS
Column 4 of A269767.
LINKS
FORMULA
Empirical: a(n) = 798*a(n-1) -180699*a(n-2) +8707236*a(n-3) -167225067*a(n-4) +1392360966*a(n-5) -4194764289*a(n-6) for n>7
EXAMPLE
Some solutions for n=1
..5..0..1..0. .5..0..0..3. .2..2..3..3. .5..0..0..0. .0..4..4..1
CROSSREFS
Cf. A269767.
Sequence in context: A263820 A269884 A145492 * A020268 A345319 A066322
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2016
STATUS
approved