A173232 Numbers k such that k and k+2 are both members of A002822.

1, 3, 5, 10, 23, 30, 38, 45, 70, 135, 170, 175, 213, 215, 268, 355, 465, 560, 588, 653, 703, 705, 710, 773, 798, 835, 940, 978, 1115, 1130, 1158, 1258, 1370, 1500, 1570, 1843, 1860, 2040, 2280, 2285, 2333, 2425, 2985, 3008, 3020, 3598, 3600, 3838, 4375, 4450, 4480

Offset: 1

Author

Juri-Stepan Gerasimov, Feb 13 2010

Keywords

• nonn

Examples

			a(1)=1 because 1 and 3 are both in A002822.
		

Crossrefs

Cf. A002822, A173233.

Programs

PARI

isokp(n) = isprime(6*n-1) && isprime(6*n+1);
isok(k) = isokp(k) && isokp(k+2); \\ Michel Marcus, May 15 2020

Extensions

Definition corrected, and sequence corrected (1158 inserted) by R. J. Mathar, May 02 2010

More terms from Jinyuan Wang, May 15 2020