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A269106 Number of nX5 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once. 1
756, 132300, 17593092, 2085484068, 232068730044, 24808345933548, 2579398703502996, 262780733311913580, 26357371124964908460, 2611360040338484328156, 256155579492309832819860 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A269109.

LINKS

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

FORMULA

Empirical: a(n) = 236*a(n-1) -19546*a(n-2) +707906*a(n-3) -13261621*a(n-4) +137719076*a(n-5) -784626841*a(n-6) +2025590366*a(n-7) +1091882414*a(n-8) -18874661724*a(n-9) +33829878231*a(n-10) +10605114324*a(n-11) -91783964484*a(n-12) +94503314304*a(n-13) -30762353664*a(n-14) for n>15

EXAMPLE

Some solutions for n=2

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

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

CROSSREFS

Cf. A269109.

Sequence in context: A269191 A269140 A269198 * A035853 A269286 A289570

Adjacent sequences:  A269103 A269104 A269105 * A269107 A269108 A269109

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 19 2016

STATUS

approved

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Last modified April 6 20:39 EDT 2020. Contains 333286 sequences. (Running on oeis4.)