login
A264742
Number of colorings of an n X n grid with at most four interchangeable colors under rotational and reflectional symmetry.
3
1, 1, 7, 1555, 22396971, 5864091026091, 24595658827938966187, 1650586719048786316922366635, 1772303994379887884341412962742479531, 30447950777727144129269702965544605972525918891, 8369468980515574351781052578115407607294645079941040482987
OFFSET
0,3
REFERENCES
F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973.
CROSSREFS
KEYWORD
nonn
AUTHOR
Marko Riedel, Nov 22 2015
STATUS
approved