



0, 3, 2, 5, 2, 8, 1, 7, 1, 8, 3, 11, 3, 9, 7, 12, 2, 13, 5, 12, 5, 12, 1, 14, 4, 10, 2, 13, 4, 21, 6, 16, 4, 11, 2, 19, 4, 7, 2, 16, 7, 23, 4, 16, 4, 11, 4, 23, 3, 18, 3, 14, 3, 21, 5, 18, 2, 14, 7, 27, 3, 9, 6, 19, 4, 24, 4, 15
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OFFSET

1,2


LINKS

Table of n, a(n) for n=1..68.
Dario Alejandro Alpern, Factorization using the Elliptic Curve Method.


FORMULA

a(n) = number of prime factors (with repetition) of integer part of (10^(2n) * 34 / 3333).


EXAMPLE

a(6)=8 because the factorization of 10201020102 = 2 * 3 * 3 * 7 * 13 * 17 * 37 * 9901.


MATHEMATICA

f[n_] := Plus @@ Transpose[ FactorInteger[ IntegerPart[10^(2n)*34 / 3333]]][[2]]; Table[ f[n], {n, 2, 30}]


CROSSREFS

Cf. A102044.
Sequence in context: A086571 A133945 A124219 * A226172 A281006 A046227
Adjacent sequences: A103830 A103831 A103832 * A103834 A103835 A103836


KEYWORD

nonn


AUTHOR

Robert G. Wilson v & Jonathan Vos Post, Feb 17 2005


EXTENSIONS

The sequence continues: ??137??, 24, 8, 24, ??145??, 15, ??149??, 13, 8, 24, 3, 25, 6, 11, 3, 31...


STATUS

approved



