1,2

Apparently a(n) exists for all n.

Note related linear patterns in the graphs of this sequence and of A215456.

Zak Seidov, Table of n, a(n) for n = 1..1000

A215456(a(n))=2n-1, n=1,2,...

Cf. A215456.

Sequence in context: A215107 A084393 A100005 * A130159 A127314 A294499

Adjacent sequences: A215454 A215455 A215456 * A215458 A215459 A215460

nonn

Zak Seidov, Aug 11 2012

approved