A361450 Number of colorings of an n X n grid up to permutation of the colors with no element having the same color as any horizontal or antidiagonal neighbor.

1, 5, 2906, 656404264, 148049849095504726, 67939294184937980415465539016, 114130286115375064054502412158789812265958284, 1159829070306179232444894822978404171908276758235252386883985596, 110658909677185498376669680234621983460781735371211477687464832774947897935655888426146

Offset

1,2

Links

Table of n, a(n) for n=1..9.

Crossrefs

Main diagonal of A208301.

Sequence in context: A199878 A076908 A060345 * A171980 A347607 A013782

Adjacent sequences: A361447 A361448 A361449 * A361451 A361452 A361453

Keyword

nonn

Author

Andrew Howroyd, Mar 13 2023

Status

approved