A361452 Number of colorings of an n X n grid up to permutation of the colors with no element having the same color as any diagonal or antidiagonal neighbor.

1, 7, 4192, 953124784, 213291369981652792, 96638817185266245591837984336, 160065721141038888919235753368205172658011648, 1603869086916486859475402575499346988054543498175515730927380336, 150972529586126094166343144224892296826763766718771806614594599643773846828229334720096

Offset

1,2

Links

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

Crossrefs

Main diagonal of A207981.

Sequence in context: A069644 A203679 A145696 * A338250 A103856 A364640

Adjacent sequences: A361449 A361450 A361451 * A361453 A361454 A361455

Keyword

nonn

Author

Andrew Howroyd, Mar 13 2023

Status

approved