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Search: id:A053789
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A053789 a(n) = A020639(A053790(n)). +0
2
2, 2, 2, 7, 2, 3, 2, 2, 2, 3, 2, 3, 2, 3, 2, 7, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 41, 2, 3, 2, 3, 2, 3, 2, 3, 2, 59, 2, 7, 2, 3, 2, 3, 2, 7, 2, 37, 2, 2, 5, 2, 2, 89, 2, 3, 2, 3, 2, 7, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 13, 2, 109, 2, 2, 17, 2, 2, 2, 7, 2, 7, 2, 2, 7, 2 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(4) = 7 because the sum of the first 8 primes is 77, and 7 is its least prime divisor.

CROSSREFS

Cf. A013918, A053790, A020639.

Adjacent sequences: A053786 A053787 A053788 this_sequence A053790 A053791 A053792

Sequence in context: A098920 A129365 A021453 this_sequence A115596 A029610 A094246

KEYWORD

easy,nonn

AUTHOR

Enoch Haga (Enokh(AT)comcast.net), Mar 27 2000

EXTENSIONS

Edited by njas, Mar 16 2008, following explication by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 26 2008

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.


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