A230837 Number of n X 4 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.

0, 162, 16496, 1361842, 114297392, 9617769208, 809092017194, 68064007019810, 5725825916551386, 481680190844257754, 40520931584406824770, 3408788505934411237796, 286761400254202666052780

Offset

1,2

Comments

Column 4 of A230840.

Links

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

Example

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

Crossrefs

Cf. A230840.

Sequence in context: A279917 A291131 A209965 * A183812 A036914 A325063

Adjacent sequences: A230834 A230835 A230836 * A230838 A230839 A230840

Keyword

nonn

Author

R. H. Hardin, Oct 31 2013

Status

approved