A173092 -id:A173092 - cp's OEIS frontend

A173135 Primes other than 3 and 5.

2, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271

Offset: 1

Juri-Stepan Gerasimov, Feb 10 2010

Cf. A173037, A173092.

a(n)=if(n>1,prime(n+2),2) \\ Charles R Greathouse IV, Aug 26 2011

Better definition from Charles R Greathouse IV, Mar 24 2010, corrected Apr 22 2010

A176002 Numbers n such that 15*prime(n)+{-4,-2,2,4} are all primes.

Original entry on oeis.org

4, 6, 34, 176, 608, 1023, 1338, 1377, 1555, 1980, 2054, 2850, 2893, 3061, 3263, 3572, 3977, 4029, 4244, 4405, 6099, 6548, 7203, 7348, 7350, 7572, 7574, 9028, 10657, 11976, 12215, 12874, 13247, 13388, 13432, 14537, 14813, 15115, 15412, 15509

Offset: 1

Juri-Stepan Gerasimov, Apr 11 2010

nonn

Numbers n such that 15*prime(n)-4, 15*prime(n)-2, 15*prime(n)+2 and 15*prime(n)+4 are primes.

			a(1)=4 because 15*prime(4)-4=101, 15*prime(4)-2=103, 15*prime(4)+2=107 and 15*prime(4)+4=109.

Cf. A112540, A173037, A173092.

p15Q[n_]:=And@@PrimeQ/@(15 Prime[n]+{-4,-2,2,4}); Select[Range[16000], p15Q]  (* Harvey P. Dale, Mar 20 2011 *)

A000040(a(n))=A112540(k).

More terms from R. J. Mathar, Apr 16 2010

cp's OEIS Frontend

A173135 Primes other than 3 and 5.

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A176002 Numbers n such that 15*prime(n)+{-4,-2,2,4} are all primes.

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