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A073262 Partial sums of first m composite numbers arising in A053781. +0
2
4, 10, 18, 63, 132, 3692, 8025, 9200, 13205, 16275, 287382, 1674342, 13852716, 261109560, 509099424, 53226407187 (list; graph; listen)
OFFSET

1,1

COMMENT

Required to extend A053781 without recomputation.

FORMULA

a(n)/A053281(n) is integer.

MATHEMATICA

c[x_] := FixedPoint[x+PrimePi[ # ]+1&, x] t=Table[0, {256}]; s=0; k=0; Do[s=s+c[n]; If[IntegerQ[s/n], k=k+1; t[[k]]=s; Print[s]], {n, 1, 12000000}] t

CROSSREFS

Cf. A053281, A073263.

Adjacent sequences: A073259 A073260 A073261 this_sequence A073263 A073264 A073265

Sequence in context: A009913 A063591 A009912 this_sequence A029714 A062198 A050858

KEYWORD

more,nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Jul 22 2002

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.


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