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A068243
1/2 the number of colorings of a 7 X 7 square array with n colors.
2
1, 20934997854, 19278946338342653286, 112656664890078627543093640, 20043672552286729048799884311015, 361011452813936865714801000277216206, 1332266848133993021484807934080054103804, 1550797305138088176220498521209275420942656
OFFSET
2,2
LINKS
Alois P. Heinz, Formula for a(n)
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2002
EXTENSIONS
More terms from Alois P. Heinz, Apr 27 2012
STATUS
approved