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A082996 a(n) = card{ x <= n : bigomega(x) = 4 }. +0
1
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 9, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11 (list; graph; listen)
OFFSET

1,24

FORMULA

a(n) ~ (1/6)*(n/log(n))*log(log(n))^3

PROGRAM

(PARI) a(n)=sum(i=1, n, if(bigomega(i)-4, 0, 1))

CROSSREFS

Cf. A072000, A072114.

Sequence in context: A111855 A071701 A064459 this_sequence A094382 A146167 A103380

Adjacent sequences: A082993 A082994 A082995 this_sequence A082997 A082998 A082999

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), May 30 2003

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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