A175683 Numbers n such that 30n-13, 30n-11, 30n-1, 30n+1, 30n+11, 30n+13 are all prime.

1, 43, 141, 720, 3038, 3466, 3772, 4068, 7896, 11402, 14070, 17499, 18683, 20887, 25166, 26586, 30311, 33237, 44072, 49791, 56629, 58268, 58764, 71483, 71953, 74284, 79939, 86022, 87199, 88941, 91951, 92273, 100176, 102019, 107505, 109438

Offset: 1

Author

Juri-Stepan Gerasimov, Aug 09 2010

Keywords

• nonn

Examples

			a(1)=1 because 30*1-13=17=prime, 30*1-11=19=prime, 30*1-1=29=prime, 30*1+1=31=prime, 30*1+11=41=prime, 30*1+13=43=prime.
		

Links

• Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A053319.

Extensions

Corrected (3472 replaced by 3772, 49776 replaced by 49791) and extended by R. J. Mathar, Aug 13 2010