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A171821
2 together with twin primes.
5
2, 3, 5, 7, 11, 13, 17, 19, 29, 31, 41, 43, 59, 61, 71, 73, 101, 103, 107, 109, 137, 139, 149, 151, 179, 181, 191, 193, 197, 199, 227, 229, 239, 241, 269, 271, 281, 283, 311, 313, 347, 349, 419, 421, 431, 433, 461, 463, 521, 523, 569, 571, 599, 601, 617, 619, 641
OFFSET
1,1
COMMENTS
Primes of the form p-1, p-2 and p+2 for p prime. - Juri-Stepan Gerasimov, Apr 30 2010
Numbers n such that A283265(n) = 0. - Mats Granvik, Mar 18 2017
LINKS
MATHEMATICA
Union@ Flatten@ Select[Partition[#, 2, 1] &@ Prime@ Range@ 117, First@ Differences@ # <= 2 &] (* Michael De Vlieger, Mar 18 2017 *)
CROSSREFS
Cf. A001097(twin primes), A283265.
Sequence in context: A141409 A238647 A348358 * A004051 A127047 A119615
KEYWORD
nonn
AUTHOR
EXTENSIONS
Entries checked by D. S. McNeil, Nov 26 2010
STATUS
approved