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A112997 Sum of first n primes minus sum of their indices. 1
1, 2, 4, 7, 13, 20, 30, 41, 55, 74, 94, 119, 147, 176, 208, 245, 287, 330, 378, 429 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

A007504 Sum of first n primes.

FORMULA

a(n)=A007504(n)-n(n+1)/2

a(n)=sum{k;1;n}A014689(n) = partial sums of A014689 - Philippe Lallouet (philip.lallouet(AT)orange.fr), Aug 27 2008

MATHEMATICA

Table[Total[Take[Table[Prime[n]-n, {n, 1, 20}], i]], {i, 20}]

CROSSREFS

Cf. A007504.

Sequence in context: A162842 A164901 A109853 * A037032 A165753 A205183

Adjacent sequences:  A112994 A112995 A112996 * A112998 A112999 A113000

KEYWORD

nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Jan 03 2006

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Last modified February 14 07:59 EST 2012. Contains 205604 sequences.