A231287 Number of 4Xn 0..3 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

0, 0, 66, 1170, 34786, 1083188, 31513702, 918670552, 26923332502, 788665534214, 23096502615266, 676415379783970, 19810153530144730, 580179175498127842, 16991673670981870826, 497634173760064848450, 14574184574564194067466

Offset

1,3

Comments

Row 4 of A231285

Links

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

Example

Some solutions for n=3
..0..1..0....0..1..2....0..1..2....0..1..0....0..1..0....0..1..0....0..1..2
..2..3..2....2..3..2....0..3..1....2..3..2....2..3..2....2..3..2....2..3..0
..2..1..0....0..1..2....2..2..1....0..1..2....2..1..0....2..2..3....2..1..2
..0..3..2....0..3..2....3..0..3....0..3..2....2..3..2....1..0..3....0..3..2

Crossrefs

Sequence in context: A284283 A168123 A240004 * A263522 A269693 A278850

Adjacent sequences: A231284 A231285 A231286 * A231288 A231289 A231290

Keyword

nonn

Author

R. H. Hardin, Nov 06 2013

Status

approved