A139766 A number n is included in the sequence if and only if the n-th integer from among those positive integers which are coprime to n+1 = the (n+1)-st integer from among those positive integers which are coprime to n.

3, 15, 104, 164, 255, 2625, 2834, 11715, 18315, 48704, 49215, 64004, 65535, 73124, 131144, 215775, 491535, 525986, 546272, 568815, 952575, 1925564, 5781434, 5861583, 13496384, 14409548, 17646615, 17949434, 20171384, 21475124, 22632285

Offset: 1

Author

Leroy Quet, Nov 07 2007

Keywords

• nonn

Comments

So far it appears that this is a proper subset of A001274.

Crossrefs

Cf. A001274, A069213, A126356, A126357.

Formula

Indices n such that A126356(n) = A126357(n). - Ray Chandler

Extensions

More terms from Stefan Steinerberger, Nov 07 2007

a(8) onwards from Ray Chandler, Jul 01 2009