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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. 1
0, 162, 16496, 1361842, 114297392, 9617769208, 809092017194, 68064007019810, 5725825916551386, 481680190844257754, 40520931584406824770, 3408788505934411237796, 286761400254202666052780 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A230840.
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 31 2013
STATUS
approved

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Last modified May 23 21:14 EDT 2024. Contains 372765 sequences. (Running on oeis4.)