A269198 - OEIS

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A269198

Number of n X 5 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

756, 68052, 5877228, 463790340, 34838403756, 2532677348772, 179867149105740, 12551707872624132, 864008559706781292, 58827234014669683044, 3969574872302454754188, 265864675607662372035012

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OFFSET

1,1

COMMENTS

Column 5 of A269201.

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

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

CROSSREFS

Cf. A269201.

Sequence in context: A037191 A269191 A269140 * A269106 A035853 A269286

Adjacent sequences: A269195 A269196 A269197 * A269199 A269200 A269201

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 20 2016

STATUS

approved