OFFSET
0,1
COMMENTS
Semiprime analog of A074496 = first prime after e^n. Lim_{n->infinity} a(n+1)/a(n) = e. There are numbers where floor(e^n) is itself a semiprime, as with floor(e^6) = 403 = 13 * 31, floor(e^15) = 3269017 = 773 * 4229, floor(e^20) = 485165195 = 5 * 97033039, floor(e^22) = 3584912846 = 2 * 1792456423, floor(e^24) = 26489122129 = 103 * 257175943.
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..100
Eric Weisstein's World of Mathematics, e-Prime.
FORMULA
MATHEMATICA
fsa[n_]:=Module[{i=1, c=Floor[E^n]}, While[PrimeOmega[c+i]!=2, i++]; c+i]; Array[fsa, 30, 0] (* Harvey P. Dale, Oct 18 2013 *)
CROSSREFS
KEYWORD
easy,nonn,less
AUTHOR
Jonathan Vos Post, May 02 2006
STATUS
approved