OFFSET
1,3
COMMENTS
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..153
Wikipedia, Chromatic Polynomial
EXAMPLE
Square array A(n,k) begins:
1, 0, 0, 0, 0, ...
2, 0, 0, 0, 0, ...
3, 6, 6, 6, 6, ...
4, 48, 1056, 45696, 4034304, ...
5, 180, 32940, 30847500, 148039757460, ...
6, 480, 393600, 3312560640, 286169360240640, ...
7, 1050, 2735250, 123791435250, 97337270132408250, ...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Alois P. Heinz, May 02 2012
STATUS
approved