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A069453 Lonely twin primes. +0
6
29, 31, 41, 43, 59, 61, 71, 73, 227, 229, 239, 241, 269, 271, 281, 283, 311, 313, 347, 349, 461, 463, 521, 523, 569, 571, 599, 601, 617, 619, 641, 643, 659, 661, 857, 859, 881, 883, 1091, 1093, 1151, 1153, 1229, 1231, 1277, 1279, 1289 (list; graph; listen)
OFFSET

1,1

EXAMPLE

The first twin primes that are not adjacent to twin primes other than their own twins are 29,31 (23 and 37 are non-twin), and 41,43 (37 and 47 are non-twin). So the sequence begins 29,31,41,43.

CROSSREFS

Cf. A001097, A035789, A069455.

Sequence in context: A007641 A050656 A050667 this_sequence A104071 A132240 A132243

Adjacent sequences: A069450 A069451 A069452 this_sequence A069454 A069455 A069456

KEYWORD

nonn

AUTHOR

N. Fernandez (primeness(AT)borve.org), Mar 22 2002

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Last modified September 4 21:24 EDT 2008. Contains 143414 sequences.


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