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A269275 Number of nX7 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once. 1
5832, 9211608, 9230973192, 7934992835112, 6310088238337128, 4786284820998999528, 3516906597130333936872, 2525822328725627338344168, 1783069155917082001205203176, 1241926797984458949166277812968 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A269276.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 1384*a(n-1) -566002*a(n-2) +61993580*a(n-3) -3083170217*a(n-4) +82564587476*a(n-5) -1288497445564*a(n-6) +12048887832352*a(n-7) -66380108132464*a(n-8) +198314583195456*a(n-9) -247475435747904*a(n-10) for n>11

EXAMPLE

Some solutions for n=2

..0..0..0..1..3..1..2. .0..0..1..0..0..1..1. .0..0..0..0..0..1..2

..2..0..0..1..3..2..2. .0..0..1..0..1..1..2. .0..0..2..2..0..0..0

CROSSREFS

Cf. A269276.

Sequence in context: A269213 A114771 A269096 * A013809 A013888 A280446

Adjacent sequences: A269272 A269273 A269274 * A269276 A269277 A269278

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 21 2016

STATUS

approved

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Last modified February 4 14:20 EST 2023. Contains 360055 sequences. (Running on oeis4.)