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A297632 Number of nX3 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 3 neighboring 1s. 1
5, 29, 113, 494, 2344, 10587, 48187, 222804, 1027173, 4742274, 21972140, 101903425, 473082512, 2198914110, 10228596580, 47609298494, 221722179703, 1033032196334, 4814686623467, 22446378284036, 104670487199231, 488182725513963 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A297637.
LINKS
FORMULA
Empirical: a(n) = 7*a(n-1) -11*a(n-2) +33*a(n-3) -184*a(n-4) +159*a(n-5) -265*a(n-6) +1190*a(n-7) -508*a(n-8) +20*a(n-9) -1256*a(n-10) +664*a(n-11) +1408*a(n-12) -2464*a(n-13) +1024*a(n-14) -768*a(n-15)
EXAMPLE
Some solutions for n=7
..0..0..0. .0..0..0. .0..0..0. .0..1..0. .0..0..1. .0..0..0. .1..0..0
..0..0..0. .1..0..1. .1..0..1. .1..1..1. .1..0..0. .0..0..1. .1..0..0
..0..0..0. .1..0..0. .0..0..0. .0..1..0. .0..0..0. .1..0..1. .1..0..0
..0..1..0. .0..0..0. .0..0..1. .1..0..0. .0..0..1. .1..0..1. .0..0..0
..0..1..0. .0..1..1. .0..0..0. .1..1..0. .0..0..0. .0..0..0. .0..1..0
..0..1..0. .0..1..1. .0..0..1. .1..1..0. .0..0..1. .1..1..1. .0..0..0
..0..1..0. .0..0..0. .1..0..1. .0..1..1. .0..0..1. .0..1..1. .0..0..1
CROSSREFS
Cf. A297637.
Sequence in context: A334544 A268929 A268244 * A153077 A000352 A327133
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 02 2018
STATUS
approved

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)