A269106 Number of n X 5 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three no more than once.

756, 132300, 17593092, 2085484068, 232068730044, 24808345933548, 2579398703502996, 262780733311913580, 26357371124964908460, 2611360040338484328156, 256155579492309832819860

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