A193169 - OEIS

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A193169

Number of odd divisors of lambda(n).

1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 2, 1, 1, 1, 2, 3, 1, 2, 2, 2, 1, 2, 2, 3, 2, 2, 1, 4, 1, 2, 1, 2, 2, 3, 3, 2, 1, 2, 2, 4, 2, 2, 2, 2, 1, 4, 2, 1, 2, 2, 3, 2, 2, 3, 2, 2, 1, 4, 4, 2, 1, 2, 2, 4, 1, 2, 2, 4, 2, 3, 3, 2, 3, 4, 2, 4, 1

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OFFSET

1,7

COMMENTS

Lambda is the function in A002322.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A001227(A002322(n)). - Michel Marcus, Mar 18 2016

EXAMPLE

a(19) = 3 because lambda(19) = 18 and the 3 odd divisors are {1, 3, 9}.

MATHEMATICA