A217851 Least semiprime m such that the previous semiprime is m - A215231(n).

6, 9, 14, 21, 33, 106, 611, 1437, 2701, 6583, 16078, 17993, 32807, 35135, 36019, 340941, 1069595, 1589717, 3586913, 5835265, 139139963, 251306399, 285074774, 327023293, 751412039, 981270997, 2655397729, 5238281053, 6498130471, 8512915685, 16328958739

Offset: 1

Author

T. D. Noe, Nov 07 2012

Keywords

• nonn
• hard

Comments

These are the semiprimes that are the upper end of the gaps of length A215231. The lower end semiprimes are given in A215232.

Links

• Donovan Johnson, Table of n, a(n) for n = 1..38

Crossrefs

Cf. A001358 (semiprimes), A131109, A215231, A215232.