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A361451
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, vertical or antidiagonal neighbor.
0
1, 2, 716, 112073062, 18633407199331522, 6575857942770612176290018153, 8769438200005128572266011359369913757287151, 72530091349507692706447958441062812294511923156598114466468667, 5746371835090565784276352813398004749296101606959968049467898643632416711373273639694
OFFSET
1,2
CROSSREFS
Main diagonal of A208054.
Sequence in context: A064976 A062665 A256669 * A159564 A185667 A119781
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Mar 13 2023
STATUS
approved