**a(1)=1, a(2) = 2. For n >=3, a(n) = the smallest integer > a(n-1) that is coprime to every sum of any two distinct earlier terms of this sequence.**

*1, 2, 4, 7, 13, 19, 29, 37, 43, 53, 59, 67, 73, 79, 89, 97, 103, 109, 127, 137, 149, 157*

*10 seqfan posts*

*Tue Sep 1 04:48:19 CEST 2009* [seqfan] Re: Now you see it, now you don't.

*Tue Sep 1 04:48:19 CEST 2009* [seqfan] Re: Now you see it, now you don't.

*Tue Sep 1 04:40:37 CEST 2009* [seqfan] Now you see it, now you don't.

*Mon Aug 31 22:22:41 CEST 2009* [seqfan] Re: Coprime To Sums

*Mon Aug 31 16:20:45 CEST 2009* [seqfan] Re: Coprime To Sums

*Sun Aug 30 22:40:55 CEST 2009* [seqfan] Re: Coprime To Sums

*Sun Aug 30 22:26:31 CEST 2009* [seqfan] Re: Coprime To Sums

*Sun Aug 30 22:26:31 CEST 2009* [seqfan] Re: Coprime To Sums

*Sun Aug 30 22:24:21 CEST 2009* [seqfan] Re: Coprime To Sums

*Sun Aug 30 18:08:22 CEST 2009* [seqfan] Coprime To Sums

Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword

Links to OEIS content are included according to
The OEIS End-User License Agreement
.