A081209 - OEIS

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A081209

Sum_{k=0..n} (-1)^(n-k)*n^k.

1, 0, 3, 20, 205, 2604, 39991, 720600, 14913081, 348678440, 9090909091, 261535698060, 8230246567621, 281241170407092, 10371206370520815, 410525522232055664, 17361641481138401521, 781282469559318055056 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	FORMULA	`a(n) = (n^(n+1)+(-1)^n)/(n+1).`
	CROSSREFS	`Cf. A031973.` `Sequence in context: A054361 A052595 A052590 * A196560 A014068 A006963` `Adjacent sequences: A081206 A081207 A081208 * A081210 A081211 A081212`
	KEYWORD	`easy,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 17 2003`

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Last modified February 17 10:57 EST 2012. Contains 206009 sequences.