A176065 Numbers n such that n-th semiprime-2 is prime.

1, 3, 6, 7, 9, 11, 15, 17, 19, 24, 28, 31, 36, 37, 43, 44, 46, 53, 56, 59, 63, 69, 77, 81, 83, 85, 92, 99, 101, 109, 112, 114, 119, 122, 127, 129, 136, 139, 144, 148, 151, 152, 154, 156, 157, 170, 175, 177, 179, 180, 184, 193, 196, 197, 203, 205, 213, 219, 224, 227

Offset

1,2

Links

Table of n, a(n) for n=1..60.

Crossrefs

Cf. A000040, A001358.

Sequence in context: A160217 A228014 A188971 * A333552 A324929 A135412

Adjacent sequences: A176062 A176063 A176064 * A176066 A176067 A176068

Keyword

nonn

Author

Juri-Stepan Gerasimov, Apr 07 2010

Extensions

Entries checked by R. J. Mathar, Apr 25 2010

Status

approved