A259247 Number of (n+1)X(5+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0011 or 0111

255, 1733, 10720, 71313, 451481, 2964676, 18970267, 123694345, 795726064, 5169185873, 33344636925, 216190905756, 1396553927379, 9045384191389, 58474650871712, 378535391931953, 2448013308032361, 15842822807262836

Offset

1,1

Comments

Column 5 of A259250

Links

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

Formula

Empirical: a(n) = 6*a(n-1) +49*a(n-2) -268*a(n-3) -920*a(n-4) +4050*a(n-5) +9218*a(n-6) -25662*a(n-7) -49822*a(n-8) +62672*a(n-9) +120020*a(n-10) -35270*a(n-11) -81969*a(n-12) +4820*a(n-13) +15497*a(n-14) -596*a(n-15) -536*a(n-16) +24*a(n-17)

Example

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

Crossrefs

Cf. A259250

Sequence in context: A236783 A237061 A236792 * A204738 A206048 A160908

Adjacent sequences: A259244 A259245 A259246 * A259248 A259249 A259250

Keyword

nonn

Author

R. H. Hardin, Jun 22 2015

Status

approved