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Search: id:A083081
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A083081 First super-diagonal of number array A083075. +0
3
1, 13, 229, 4921, 128841, 4022341, 146450893, 6103787761, 286833509137, 15011892880381, 866190689012661, 54637591044108073, 3740820141248285785, 276304073198956644661, 21900911192388373534621 (list; graph; listen)
OFFSET

1,2

FORMULA

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

CROSSREFS

Cf. A083080, A083082.

Adjacent sequences: A083078 A083079 A083080 this_sequence A083082 A083083 A083084

Sequence in context: A140841 A062127 A068120 this_sequence A083306 A114755 A142610

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 23 2003

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.


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