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Search: id:A081302
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A081302 Subdiagonal of square array A081297. +0
6
1, 1, 21, 61, 1891, 9633, 404713, 2997541, 159902271, 1564345201, 101406750589, 1236882490845, 94479649710811, 1382731226210881, 121677107761110993, 2079381120597925237, 207197254527662127511, 4051708966720224576081 (list; graph; listen)
OFFSET

0,3

FORMULA

a(n)=((n+3)^(n+1)-(-(n+2))^(n+1))/(2n+5).

CROSSREFS

Cf. A081298, A081299, A081300, A081301.

Sequence in context: A069133 A124714 A126375 this_sequence A058100 A082060 A025525

Adjacent sequences: A081299 A081300 A081301 this_sequence A081303 A081304 A081305

KEYWORD

easy,nonn

AUTHOR

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

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.


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