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A230992
Number of nX4 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 at least one element with value (x(i,j)-1) mod 4, and upper left element zero
1
0, 16, 182, 10914, 465638, 20549430, 899786196, 39531660010, 1735714471900, 76213836360618, 3346443118527598, 146938989787609588, 6451913103215823902, 283296068073088420816, 12439202883241219243898, 546191007683593063562226
OFFSET
1,2
COMMENTS
Column 4 of A230994
LINKS
EXAMPLE
Some solutions for n=3
..0..1..3..0....0..1..0..3....0..3..3..0....0..1..3..0....0..3..1..0
..3..2..1..1....3..2..1..2....1..2..2..1....3..2..0..1....1..2..3..2
..3..0..3..2....0..1..0..3....1..0..3..0....2..1..3..2....1..0..0..1
CROSSREFS
Sequence in context: A204608 A279282 A231135 * A016298 A288720 A125428
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 02 2013
STATUS
approved