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A161620 Primorial numbers, A002110, that are also in the sequence {n^2 + n}, n = 1,2,3,..., sequence A002378. +0
1
2, 6, 30, 210, 510510 (list; graph; listen)
OFFSET

1,1
COMMENT

Conjecture: the set is infinite.

CROSSREFS

A002110, A002378.

Sequence in context: A077176 A101178 A091456 this_sequence A108204 A088160 A112317

Adjacent sequences: A161617 A161618 A161619 this_sequence A161621 A161622 A161623

KEYWORD

nonn

AUTHOR

Daniel Tisdale (daniel6874(AT)gmail.com), Jun 14 2009

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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