A239149 - OEIS

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A239149

Number of (n+1)X(n+1) 0..3 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..3 introduced in row major order

1, 2, 868, 135766, 821135900, 5427557363908, 486439997897622259, 105891766683961733641397

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Diagonal of A239155

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

..0..1..0..2..1....0..1..1..2..3....0..1..2..3..2....0..1..2..0..3

..3..1..3..2..3....0..2..1..2..3....0..1..3..3..2....0..1..0..1..0

..3..1..3..2..3....3..2..2..3..2....0..2..3..0..2....0..2..0..1..0

CROSSREFS

Sequence in context: A128667 A199947 A230569 * A050247 A159705 A229678

Adjacent sequences: A239146 A239147 A239148 * A239150 A239151 A239152

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 11 2014

STATUS

approved