A264741 Number of colorings of an n X n grid with at most three interchangeable colors under rotational and reflectional symmetry.

1, 1, 6, 490, 901012, 17653123147, 3126972103187548, 4985402694248850150928, 71535079589434063488162675274, 9238051838396620455005158025879826301, 10737031681916902729933722097695167945304711946, 112313143744651950650823741924955687289755947171340131550

Offset

0,3

References

F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973.

Links

Table of n, a(n) for n=0..11.

Math StackExchange, A 4 x 4 grid of squares.

Marko Riedel, Maple code, Power Group Enumeration

Crossrefs

Cf. A182044, A264787, A357536.

Sequence in context: A248361 A345027 A203428 * A197205 A197803 A099057

Adjacent sequences: A264738 A264739 A264740 * A264742 A264743 A264744

Keyword

nonn

Author

Marko Riedel, Nov 22 2015

Status

approved