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A083571 Numbers n such that A008509(n) is prime. 3
2, 3, 5, 10, 12, 72 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

LINKS

P. De Geest, Subsets of palindromic triangulars

CROSSREFS

Cf. A008509, A050722, A008510, A050721.

Sequence in context: A079251 A171785 A050051 * A123090 A129281 A022426

Adjacent sequences:  A083568 A083569 A083570 * A083572 A083573 A083574

KEYWORD

nonn,base,hard

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Jun 14, 2003

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Last modified February 14 23:16 EST 2012. Contains 205687 sequences.