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A122262 Number of numbers having only factors that are Pierpont primes. +0
2
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 20, 20, 21, 22, 23, 24, 25, 25, 26, 26, 27, 27, 28, 29, 30, 31, 32, 33, 34, 34, 35, 35, 35, 36, 36, 36, 37, 38, 39, 40, 41, 41, 42, 42, 43, 44, 44, 44, 45, 45, 45, 46, 47, 48, 48, 48, 49, 49, 50, 50, 51 (list; graph; listen)
OFFSET

1,2

COMMENT

Partial sums of A122261.

LINKS

Eric Weisstein's World of Mathematics, Pierpont Prime

CROSSREFS

Sequence in context: A071604 A061069 A122256 this_sequence A017895 A130024 A131232

Adjacent sequences: A122259 A122260 A122261 this_sequence A122263 A122264 A122265

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 29 2006

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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