1,2

Apparently there is a claim that A268642 contains every positive integer exactly once, so this sequence is well-defined.

N. J. A. Sloane, Table of n, a(n) for n = 1..945

# Let b1 be a list of the initial terms of A268642

ans:=[];

for n from 1 to nops(b1) do

if member(n, b1, 'p') then ans:=[op(ans), p];

else lprint("missed", n); break; fi;

od;

ans;

Cf. A268642.

Sequence in context: A071653 A227631 A246830 * A056861 A302846 A214844

Adjacent sequences: A268528 A268529 A268530 * A268532 A268533 A268534

nonn

N. J. A. Sloane, Feb 17 2016

approved