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Search: id:A131991
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A131991 1 + prime(n) + prime(n)^2 + prime(n)^3. +0
8
15, 40, 156, 400, 1464, 2380, 5220, 7240, 12720, 25260, 30784, 52060, 70644, 81400, 106080, 151740, 208920, 230764, 305320, 363024, 394420, 499360, 578760, 712980, 922180, 1040604, 1103440, 1236600, 1307020, 1455780, 2064640, 2265384, 2590260 (list; graph; listen)
OFFSET

1,1

COMMENT

a(n) = 1 + A060800(n)*A000040(n).

FORMULA

a(n) = (A030514(n) - 1)/A006093(n).

CROSSREFS

Cf. A030078, A008864, A131992, A131993.

Sequence in context: A005337 A038991 A068020 this_sequence A116042 A103003 A024845

Adjacent sequences: A131988 A131989 A131990 this_sequence A131992 A131993 A131994

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 06 2007

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Last modified December 3 01:16 EST 2008. Contains 151161 sequences.


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