id:A129591 - OEIS Search Results

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For each permutation p of {1,2,...,n} define min(p) = min{ p(i) + i : i = 1..n }; a(n) is the sum of min(p) of all p.

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2, 5, 17, 75, 407, 2619, 19487, 164571, 1555007, 16252779, 186167087, 2319025851, 31210884767, 451319283339, 6978220721807 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`Sum _{k=0..n-1} (n-k+1)k!((k+1)^(n-k)-k^(n-k)).`
	CROSSREFS	`Cf. A018927.` `Sequence in context: A000774 A081046 A118100 this_sequence A099825 A014288 A020096` `Adjacent sequences: A129588 A129589 A129590 this_sequence A129592 A129593 A129594`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), May 30 2007`

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Last modified February 9 11:24 EST 2010. Contains 172296 sequences.