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A370845
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a(n) = (n-2)^n*n!.
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0
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-1, 0, 6, 384, 29160, 2949120, 393750000, 67722117120, 14643516908160, 3896394330931200, 1252631480200531200, 479001600000000000000, 214973646592670930764800, 111929817779497742421196800
(list;
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listen;
history;
text;
internal format)
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OFFSET
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1,3
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COMMENTS
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For n > 2, a(n) is the number of minimum vertex colorings of the n-sun graph.
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LINKS
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Eric Weisstein's World of Mathematics, Sun Graph.
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MATHEMATICA
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Table[(n - 2)^n n!, {n, 20}]
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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