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A102414
Smallest semiprime greater than n-th prime.
5
4, 4, 6, 9, 14, 14, 21, 21, 25, 33, 33, 38, 46, 46, 49, 55, 62, 62, 69, 74, 74, 82, 85, 91, 106, 106, 106, 111, 111, 115, 129, 133, 141, 141, 155, 155, 158, 166, 169, 177, 183, 183, 194, 194, 201, 201, 213, 226, 235, 235, 235, 247, 247, 253, 259, 265, 274, 274
OFFSET
1,1
COMMENTS
A102415(n) < A000040(n) < a(n).
LINKS
Eric Weisstein's World of Mathematics, Semiprime
MATHEMATICA
ssp[n_]:=Module[{k=n+1}, While[PrimeOmega[k]!=2, k++]; k]; ssp/@Prime[Range[ 60]] (* Harvey P. Dale, Aug 18 2012 *)
PROG
(PARI) a(n) = {sp = prime(n)+1; while(bigomega(sp) != 2, sp++); sp; } \\ Michel Marcus, Mar 04 2017
CROSSREFS
Cf. A001358.
Sequence in context: A200609 A343985 A128037 * A127799 A213375 A226834
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jan 08 2005
STATUS
approved