A351944 - OEIS

A351944

a(n) = A003557(A181819(n)).

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

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OFFSET

1,6

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..20000

Index entries for sequences computed from exponents in factorization of n

FORMULA

a(n) = A181819(n) / A329601(n) = A003557(A181819(n)).

PROG

(PARI)

A003557(n) = (n/factorback(factorint(n)[, 1]));

A181819(n) = factorback(apply(e->prime(e), (factor(n)[, 2])));