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A264741 Number of colorings of an n X n grid with at most three interchangeable colors under rotational and reflectional symmetry. 2
1, 1, 6, 490, 901012, 17653123147, 3126972103187548, 4985402694248850150928, 71535079589434063488162675274, 9238051838396620455005158025879826301, 10737031681916902729933722097695167945304711946, 112313143744651950650823741924955687289755947171340131550 (list; graph; refs; listen; history; text; internal format)
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.

Sequence in context: A006712 A248361 A203428 * A197205 A197803 A099057

Adjacent sequences:  A264738 A264739 A264740 * A264742 A264743 A264744

KEYWORD

nonn

AUTHOR

Marko Riedel, Nov 22 2015

STATUS

approved

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Last modified September 27 00:14 EDT 2020. Contains 337378 sequences. (Running on oeis4.)