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0,3
Table of n, a(n) for n=0..79.
floor(e^3) = floor(20.08553) = 20. 20 has two distinct prime factors (2 and 5), therefore a(3) = 2.
Table[Length[FactorInteger[Floor[E^n]]], {n, 1, 80}]
PrimeNu[Floor[E^Range[80]]] (* Harvey P. Dale, Jul 21 2013 *)
Cf. A001113 [decimal expansion of e].
Sequence in context: A025809 A204591 A279220 * A131849 A244479 A090735
Adjacent sequences: A114572 A114573 A114574 * A114576 A114577 A114578
nonn
Stefan Steinerberger, Feb 17 2006
approved