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A036430 Let b(0)=n, b(i)=# of prime factors of b(i-1); then a(n)=i such that b(i)=1. +0
2
0, 1, 1, 2, 1, 2, 1, 2, 2, 2, 1, 2, 1, 2, 2, 3, 1, 2, 1, 2, 2, 2, 1, 3, 2, 2, 2, 2, 1, 2, 1, 2, 2, 2, 2, 3, 1, 2, 2, 3, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 3, 2, 3, 2, 2, 1, 3, 1, 2, 2, 3, 2, 2, 1, 2, 2, 2, 1, 2, 1, 2, 2, 2, 2, 2, 1, 2, 3, 2, 1, 3, 2, 2, 2, 3, 1, 3, 2, 2, 2, 2, 2, 3, 1, 2, 2, 3, 1, 2, 1, 3, 2 (list; graph; listen)
OFFSET

1,4

FORMULA

a(n)=1+a(bigomega(n)). - Vladeta Jovovic (vladeta(AT)eunet.rs), Jul 10 2004

EXAMPLE

Let b(0) = 16, then b(1) = 4 and b(2) = 2, then b(3) = 1, hence a(16)=3.

CROSSREFS

Cf. A029908, A073855.

Sequence in context: A072491 A051034 A082477 this_sequence A163377 A163109 A128428

Adjacent sequences: A036427 A036428 A036429 this_sequence A036431 A036432 A036433

KEYWORD

nonn,easy

AUTHOR

Dann Toliver (fsdrt(AT)hotmail.com)

EXTENSIONS

Corrected and extended by Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 21 2003

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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