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A305229 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 3 or 8 king-move adjacent elements, with upper left element zero. 1
64, 719, 509, 1248, 5958, 26528, 135183, 656194, 3279365, 16250652, 81031953, 403509236, 2011945563, 10030039280, 50016127121, 249410319660, 1243788731837, 6202713557772, 30933122777137, 154265006485596, 769330468164179 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A305230.
LINKS
FORMULA
Empirical: a(n) = 8*a(n-1) -8*a(n-2) -58*a(n-3) +109*a(n-4) +53*a(n-5) -164*a(n-6) +350*a(n-7) -839*a(n-8) -337*a(n-9) +2217*a(n-10) -1688*a(n-11) +1782*a(n-12) -123*a(n-13) -7364*a(n-14) +8415*a(n-15) -422*a(n-16) -4654*a(n-17) +8939*a(n-18) -8494*a(n-19) -1367*a(n-20) +5630*a(n-21) -3708*a(n-22) +2283*a(n-23) +562*a(n-24) -1497*a(n-25) +288*a(n-26) +112*a(n-27) -24*a(n-28) for n>35
EXAMPLE
Some solutions for n=5
..0..1..1..1..1..1..1. .0..1..1..1..1..1..1. .0..0..0..0..0..1..1
..1..1..1..1..0..1..1. .1..1..1..0..1..0..1. .0..1..0..0..0..1..1
..1..1..1..1..1..1..1. .1..1..1..1..1..1..1. .0..0..0..0..0..1..1
..1..1..1..1..1..1..1. .0..1..1..0..1..1..1. .0..0..0..0..0..1..1
..0..1..1..1..1..1..0. .0..0..1..1..1..1..0. .0..0..0..0..0..1..1
CROSSREFS
Cf. A305230.
Sequence in context: A320408 A223963 A303726 * A304774 A316517 A304471
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 27 2018
STATUS
approved

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Last modified June 15 16:27 EDT 2024. Contains 373407 sequences. (Running on oeis4.)