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

Author

R. H. Hardin, Jun 22 2015

Keywords

• nonn

Comments

Column 5 of A259250

Examples

			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
		

Links

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

Crossrefs

Cf. A259250

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)