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A217851
Least semiprime m such that the previous semiprime is m - A215231(n).
3
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
1,1
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
CROSSREFS
Cf. A001358 (semiprimes), A131109, A215231, A215232.
Sequence in context: A154778 A316014 A106350 * A218697 A361696 A316015
KEYWORD
nonn,hard
AUTHOR
T. D. Noe, Nov 07 2012
STATUS
approved