id:A068476 - OEIS Search Results

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a(n)=sum(m*n^(m+(-1)^n),m=1..n).

+0
1

0, 1, 20, 34, 5008, 3711, 1948356, 937924, 1205220416, 429794605, 1098765432100, 310989720966, 1390027428561168, 326011399456939, 2332600912091693348, 466937872906120456, 5016202619581534249216, 875711370981239308953 (list; graph; listen)

	OFFSET	`0,3`
	EXAMPLE	`a(2)=2^(1+1)+2*2^(2+1)=4+16=20.`
	MAPLE	`b := n->sum(m*n^(m+(-1)^n), m=1..n);`
	CROSSREFS	`Sequence in context: A043166 A043946 A060124 this_sequence A003895 A024747 A081962` `Adjacent sequences: A068473 A068474 A068475 this_sequence A068477 A068478 A068479`
	KEYWORD	`nonn`
	AUTHOR	`Francois Jooste (phukraut(AT)hotmail.com), Mar 10 2002`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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