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Search: id:A081298
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A081298 Main diagonal of the square array A081297. +0
6
1, 1, 7, 25, 461, 2821, 84883, 734161, 30684601, 342800821, 18348174791, 251203133545, 16394732478853, 265727053328101, 20464206411678331, 383172119935376161, 34011762638354230001, 722380674949394645269 (list; graph; listen)
OFFSET

0,3

FORMULA

a(n)=((n+1)^(n+1)-(-n)^(n+1))/(2n+1).

CROSSREFS

Cf. A081299, A081300, A081301, A081302.

Sequence in context: A082651 A151491 A088009 this_sequence A012490 A157702 A063453

Adjacent sequences: A081295 A081296 A081297 this_sequence A081299 A081300 A081301

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Mar 17 2003

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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