A269086 Number of nX5 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two not more than once.

23, 191, 1531, 11314, 80422, 555789, 3761534, 25063389, 164926651, 1074440360, 6941695514, 44537043804, 284052377508, 1802408061740, 11386034886784, 71645923776799, 449267054051740, 2808501899850347, 17508131088788801

Offset

1,1

Comments

Column 5 of A269089.

Links

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

Formula

Empirical: a(n) = 2*a(n-1) +41*a(n-2) +54*a(n-3) -509*a(n-4) -2182*a(n-5) -2830*a(n-6) +1766*a(n-7) +7914*a(n-8) +2584*a(n-9) -10583*a(n-10) -6092*a(n-11) +11506*a(n-12) +5348*a(n-13) -11688*a(n-14) -620*a(n-15) +9251*a(n-16) -4462*a(n-17) -3137*a(n-18) +4774*a(n-19) -2365*a(n-20) +338*a(n-21) +198*a(n-22) -106*a(n-23) +12*a(n-24) +4*a(n-25) -a(n-26)

Example

Some solutions for n=4
..0..0..1..0..1. .1..0..0..1..1. .0..0..0..1..0. .1..0..0..0..0
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..1..0. .0..1..0..1..0
..1..0..1..0..0. .0..0..0..0..0. .1..0..0..0..0. .0..0..1..0..0
..0..0..0..1..0. .1..0..1..0..1. .0..0..1..0..0. .0..0..0..0..1

Crossrefs

Cf. A269089.

Sequence in context: A129052 A201859 A232150 * A160083 A140545 A062640

Adjacent sequences: A269083 A269084 A269085 * A269087 A269088 A269089

Keyword

nonn

Author

R. H. Hardin, Feb 19 2016

Status

approved