A092209 Smallest number k such that k, k+2, k+4, ..., k+2n are semiprimes.

4, 4, 91, 213, 213, 1383, 3091, 8129

Offset

0,1

Comments

Semiprimes in arithmetic progression. All terms are odd, except for the first two. See also A056809.

Links

Table of n, a(n) for n=0..7.

Eric Weisstein's World of Mathematics, Semiprime.

Crossrefs

First entry in A001358, A092207, A092125, A092126, A092127, A092128, A092129, A082919 respectively.

Sequence in context: A317868 A224092 A217188 * A068337 A009534 A009559

Adjacent sequences: A092206 A092207 A092208 * A092210 A092211 A092212

Keyword

nonn,fini,full

Author

Robert G. Wilson v and Zak Seidov, Feb 24 2004

Status

approved