A185839 Number of (n+1)X4 0..2 arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace

405, 20097, 424197, 10670517, 254648349, 6182861913, 149296412943, 3610924080057, 87290961055317, 2110537794502179, 51026182728455493, 1233673268942605563, 29826690561521146107, 721125280774829859129

Offset

1,1

Comments

Column 3 of A185845

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 3X4
..2..1..1..0....0..1..0..2....1..0..2..2....2..2..0..1....1..0..0..2
..2..2..0..0....1..2..2..2....2..2..2..0....1..1..0..1....0..0..2..2
..0..2..2..1....0..1..1..0....1..1..0..0....1..2..1..1....0..1..2..0

Crossrefs

Sequence in context: A219147 A239541 A187134 * A285924 A285860 A151634

Adjacent sequences: A185836 A185837 A185838 * A185840 A185841 A185842

Keyword

nonn

Author

R. H. Hardin Feb 05 2011

Status

approved