A225637 a(n) = A003418(n)/A225629(n).

1, 1, 2, 2, 3, 2, 2, 5, 7, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 2, 3, 2, 2, 2, 3, 3, 2, 2, 3, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 6, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2

Offset: 0

Author

Antti Karttunen, May 13 2013

Keywords

• nonn

Comments

For n >= 2, a(n) is the final factor by which the A225629(n) needs to be multiplied that it finally reaches the fixed point A003418(n) of the column n of A225630.

The first composite, 4, occurs at n=20. The first composite which is not power of prime, namely 6, occurs at n=61.

For all n >= 3, a(n) divides A225558(n).

Crossrefs

Cf. A003418, A225629, A225636, A225558, A225652, A225656.

Programs

Scheme

(define (A225637 n) (/ (A003418 n) (A225629 n)))