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A370845
a(n) = (n-2)^n*n!.
0
-1, 0, 6, 384, 29160, 2949120, 393750000, 67722117120, 14643516908160, 3896394330931200, 1252631480200531200, 479001600000000000000, 214973646592670930764800, 111929817779497742421196800
OFFSET
1,3
COMMENTS
For n > 2, a(n) is the number of minimum vertex colorings of the n-sun graph.
LINKS
Eric Weisstein's World of Mathematics, Minimum Vertex Coloring.
Eric Weisstein's World of Mathematics, Sun Graph.
MATHEMATICA
Table[(n - 2)^n n!, {n, 20}]
CROSSREFS
Sequence in context: A078207 A261296 A060871 * A193133 A162137 A119645
KEYWORD
sign,easy
AUTHOR
Eric W. Weisstein, Mar 03 2024
STATUS
approved