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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 0
 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 ..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 ..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

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Last modified July 17 05:50 EDT 2024. Contains 374360 sequences. (Running on oeis4.)