A141378 a(n) = the smallest positive integer non-coprime to both n and sigma(n), where sigma(n) is the sum of divisors of n.

6, 6, 14, 10, 2, 14, 6, 39, 2, 22, 2, 26, 2, 3, 62, 34, 3, 38, 2, 6, 2, 46, 2, 155, 2, 6, 2, 58, 2, 62, 6, 3, 2, 10, 14, 74, 2, 6, 2, 82, 2, 86, 2, 3, 2, 94, 2, 21, 6, 3, 2, 106, 2, 10, 2, 6, 2, 118, 2, 122, 2, 6, 254, 10, 2, 134, 2, 3, 2, 142, 3, 146, 2, 6, 2, 14, 2, 158, 2, 33, 2, 166, 2, 10

Offset

2,1

Links

Table of n, a(n) for n=2..85.

Formula

a(n) = A141327(n, A000203(n)).

Crossrefs

Cf. A141327, A141377, A141379.

Sequence in context: A168332 A214828 A229828 * A003871 A220698 A315802

Adjacent sequences: A141375 A141376 A141377 * A141379 A141380 A141381

Keyword

nonn

Author

Leroy Quet, Jun 28 2008

Extensions

Extended by Ray Chandler, Jun 24 2009

Status

approved