A130466 Triangle where the n-th row consists of the n smallest positive integers which are coprime to the sum of divisors of n.

1, 1, 2, 1, 3, 5, 1, 2, 3, 4, 1, 5, 7, 11, 13, 1, 5, 7, 11, 13, 17, 1, 3, 5, 7, 9, 11, 13, 1, 2, 4, 7, 8, 11, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 5, 7, 11, 13, 17, 19, 23, 25, 29, 1, 5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 1, 3, 5, 9, 11, 13, 15, 17, 19, 23, 25, 27, 1, 3, 5, 9, 11, 13, 15, 17, 19

Offset

1,3

Links

Table of n, a(n) for n=1..87.

Crossrefs

Cf. A122212, A130465.

Sequence in context: A317750 A188732 A085189 * A239306 A129322 A089984

Adjacent sequences: A130463 A130464 A130465 * A130467 A130468 A130469

Keyword

nonn,tabl

Author

Leroy Quet, May 27 2007

Extensions

More terms from Sean A. Irvine, Mar 02 2010

Status

approved