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

0,3

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).

Links

Table of n, a(n) for n=0..100.

Prog

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

Crossrefs

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

Sequence in context: A351627 A206762 A212281 * A185268 A279630 A279632

Adjacent sequences: A225634 A225635 A225636 * A225638 A225639 A225640

Keyword

nonn

Author

Antti Karttunen, May 13 2013

Status

approved