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A068820 Ulam numbers that are primes. +0
1
2, 3, 11, 13, 47, 53, 97, 131, 197, 241, 409, 431, 607, 673, 739, 751, 983, 991, 1103, 1433, 1489, 1531, 1553, 1709, 1721, 2371, 2393, 2447, 2633, 2789, 2833, 2897, 3041, 3109, 3217, 3371, 3373, 3527, 3547, 3593, 3671, 3691, 4057, 4153, 4211, 4297, 4363 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Cf. A002858.

Sequence in context: A161322 A123239 A048891 this_sequence A129670 A057324 A139052

Adjacent sequences: A068817 A068818 A068819 this_sequence A068821 A068822 A068823

KEYWORD

easy,nonn

AUTHOR

Naohiro Nomoto (n_nomoto(AT)yabumi.com), Mar 29 2002

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.


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