A092209 - OEIS

%I #10 Feb 16 2025 08:32:52

%S 4,4,91,213,213,1383,3091,8129

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

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

%H Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Semiprime.html">Semiprime.</a>

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

%K nonn,fini,full

%O 0,1

%A _Robert G. Wilson v_ and _Zak Seidov_, Feb 24 2004