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A269148 Number of nX4 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three exactly once. 1
108, 6224, 220968, 7002040, 208984848, 6004186984, 167970539096, 4607603633440, 124496158984840, 3323815506994632, 87881068225023056, 2304923699010954504, 60044569367490800584, 1555171706058316642096, 40078683916858034569112 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A269152.

LINKS

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

FORMULA

Empirical: a(n) = 58*a(n-1) -1093*a(n-2) +7680*a(n-3) -27078*a(n-4) +58958*a(n-5) -88914*a(n-6) +82212*a(n-7) -35159*a(n-8) -20796*a(n-9) +39556*a(n-10) -11364*a(n-11) -13593*a(n-12) +9618*a(n-13) +429*a(n-14) -2060*a(n-15) +434*a(n-16) +166*a(n-17) -92*a(n-18) +16*a(n-19) -a(n-20) for n>22

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A269152.

Sequence in context: A035812 A054624 A147821 * A143403 A269210 A299857

Adjacent sequences:  A269145 A269146 A269147 * A269149 A269150 A269151

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 20 2016

STATUS

approved

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Last modified July 23 22:49 EDT 2019. Contains 325278 sequences. (Running on oeis4.)