A156543 Multiplicative closure of primes that are not Sophie Germain primes (A053176).

1, 7, 13, 17, 19, 31, 37, 43, 47, 49, 59, 61, 67, 71, 73, 79, 91, 97, 101, 103, 107, 109, 119, 127, 133, 137, 139, 149, 151, 157, 163, 167, 169, 181, 193, 197, 199, 211, 217, 221, 223, 227, 229, 241, 247, 257, 259, 263, 269, 271, 277, 283, 289, 301, 307, 311

Offset

1,2

Comments

a(n) mod 6 = 1 or = 5; subsequence of A007310;

A156542(a(n)) = 0;

A045979 is a subsequence.

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A007310, A045979, A053176, A156541, A156542.

Sequence in context: A237609 A038906 A097959 * A090863 A045979 A079699

Adjacent sequences: A156540 A156541 A156542 * A156544 A156545 A156546

Keyword

nonn

Author

Reinhard Zumkeller, Feb 09 2009

Status

approved