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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
1, 5, 2906, 656404264, 148049849095504726, 67939294184937980415465539016, 114130286115375064054502412158789812265958284, 1159829070306179232444894822978404171908276758235252386883985596, 110658909677185498376669680234621983460781735371211477687464832774947897935655888426146
OFFSET
1,2
CROSSREFS
Main diagonal of A208301.
Sequence in context: A199878 A076908 A060345 * A171980 A347607 A013782
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Mar 13 2023
STATUS
approved