A361449 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, diagonal or antidiagonal neighbor.

1, 4, 1573, 235862938, 37155328943771767, 12458003910177278332403197817, 15868284521418341362691384074620547198698934, 126024243590219798408446284849897811759970155660106999854057796, 9633603531065043175094488158875624821526224424118142906010095879389674957042528276201

Offset

1,2

Links

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

Crossrefs

Main diagonal of A208096.

Sequence in context: A030253 A278549 A229664 * A265661 A280793 A160225

Adjacent sequences: A361446 A361447 A361448 * A361450 A361451 A361452

Keyword

nonn

Author

Andrew Howroyd, Mar 13 2023

Status

approved