A251255 Number of (n+1)X(5+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge

180, 1232, 5680, 38332, 185620, 1215600, 6080510, 38748690, 198765264, 1238605998, 6482518286, 39672453450, 211010740516, 1272735272854, 6857786261434, 40883144370828, 222596116574864, 1314621503491854

Offset

1,1

Comments

Column 5 of A251258

Links

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

Formula

Empirical: a(n) = a(n-1) +58*a(n-2) -36*a(n-3) -1155*a(n-4) +410*a(n-5) +10503*a(n-6) -1721*a(n-7) -47392*a(n-8) +1567*a(n-9) +107095*a(n-10) +5793*a(n-11) -116154*a(n-12) -14099*a(n-13) +54760*a(n-14) +9080*a(n-15) -8738*a(n-16) -1844*a(n-17)

Example

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

Crossrefs

Sequence in context: A259312 A032774 A032776 * A251204 A225933 A225932

Adjacent sequences: A251252 A251253 A251254 * A251256 A251257 A251258

Keyword

nonn

Author

R. H. Hardin, Dec 01 2014

Status

approved