%I #15 Dec 24 2021 08:12:28
%S 1,3,5,10,12,17,20,24,30,35,41,44,47,52,56,59,63,66,72,81,84,89,92,98,
%T 101,105,110,116,121,125,129,134,138,142,148,152,156,162,168,173,179,
%U 183,187,196,199,202,208,212,215,225,228,232,236,242,246,251
%N Indices in A181391 (Van Eck's Sequence) where a new term first appears.
%C Alternate name: Terms in A171862 in ascending order.
%C The sequence includes seed value A181391(1)=1.
%H Rémy Sigrist, <a href="/A263652/b263652.txt">Table of n, a(n) for n = 1..10000</a>
%H Rémy Sigrist, <a href="/A263652/a263652.txt">C++ program for A263652</a>
%F a(n) = A171865(n+1) - 1. - _Jan Ritsema van Eck_, Jul 24 2019
%o (C++) See Links section.
%Y Cf. A171862, A171863, A171865, A181391.
%K nonn
%O 1,2
%A _Bob Selcoe_, Oct 23 2015