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Search: id:A068475
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A068475 a(n)=sum(m*n^(m-1),m=1..n). +0
1
0, 1, 5, 34, 313, 3711, 54121, 937924, 18831569, 429794605, 10987654321, 310989720966, 9652968253897, 326011399456939, 11901025061692313, 466937872906120456, 19594541482740368161, 875711370981239308953 (list; graph; listen)
OFFSET

0,3

EXAMPLE

a(2)=sum(m*2^(m-1),m=1..2)=1+2*2=5.

MAPLE

a := n->sum(m*n^(m-1), m=1..n);

CROSSREFS

Sequence in context: A090367 A111557 A121323 this_sequence A097817 A133297 A054931

Adjacent sequences: A068472 A068473 A068474 this_sequence A068476 A068477 A068478

KEYWORD

nonn

AUTHOR

Francois Jooste (phukraut(AT)hotmail.com), Mar 10 2002

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.


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