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A269211 Number of nX5 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once. 1
432, 49536, 4744704, 394072704, 30541426560, 2267772823680, 163535201141376, 11544796423498368, 801929439109544064, 54999867607734747264, 3733606080456064161408, 251316480848067823807104 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A269214.

LINKS

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

FORMULA

Empirical: a(n) = 156*a(n-1) -8170*a(n-2) +166732*a(n-3) -1381249*a(n-4) +2520764*a(n-5) +23584856*a(n-6) -130579860*a(n-7) +143100280*a(n-8) +633365472*a(n-9) -2425054036*a(n-10) +3486590032*a(n-11) -2082954096*a(n-12) -207585696*a(n-13) +891171072*a(n-14) -335167488*a(n-15) -34112320*a(n-16) +43766784*a(n-17) -8385024*a(n-18) +497664*a(n-19) -9216*a(n-20) for n>21

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A269214.

Sequence in context: A299861 A269149 A113921 * A269094 A269273 A300053

Adjacent sequences: A269208 A269209 A269210 * A269212 A269213 A269214

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 20 2016

STATUS

approved

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Last modified January 28 20:13 EST 2023. Contains 359905 sequences. (Running on oeis4.)