A174046 Places n for which A001359(n) and A023200(n) is a twin prime pair.

2, 3, 4, 6, 14, 16, 29, 356, 358, 359, 403, 446, 464, 485, 652, 655, 764, 861, 866, 1123, 1301, 1304, 1324, 1328, 1358, 1486, 1610, 2631, 2632, 3735, 3931, 3953, 3956, 3957, 4679, 4855, 4931, 5222, 5226, 5269, 5283, 5292, 5403, 5427, 5445

Offset

1,1

Links

Michel Marcus, Table of n, a(n) for n = 1..149

Example

2 is in the sequence because A001359(2)=5 and A023200(2)=7 are twin primes.

Prog

(PARI) lista(nn)  = {vp = primes(nn); va = select(x->isprime(x+2), vp); vb = select(x->isprime(x+4), vp); for (n=1, min(#va, #vb), if (vb[n] == va[n]+2, print1(n, ", ")); ); } \\ Michel Marcus, Jul 22 2017

Crossrefs

Cf. A023200, A001359, A046132, A006512, A174042

Sequence in context: A363198 A188715 A369849 * A095991 A293714 A049911

Adjacent sequences: A174043 A174044 A174045 * A174047 A174048 A174049

Keyword

nonn

Author

Vladimir Shevelev, Mar 06 2010

Extensions

Terms beyond 29 from R. J. Mathar, Nov 03 2011

Edited by Michel Marcus, Jul 22 2017

Status

approved