%I #3 Mar 30 2012 17:28:13
%S 1,2,4,7,10,15,17,20,23,25,26,31,37,39,40,41,42,44,50,53,56,59,60,71,
%T 73,81,86,92,97,104,105,111,115,116,118,120,126,131,139,141,142,143,
%U 153,164,166,169,177,180,181,191,193,195,196,198,203,205,206,208,212,225,230,232
%N Position where A171921(n) first occurs in A171922.
%H Hugo van der Sanden, <a href="/A171926/b171926.txt">Table of n, a(n) for n = 1..2347</a>
%Y Cf. A171921, A171922, A171927, A171928.
%K nonn
%O 1,2
%A _Hugo van der Sanden_, Oct 23 2010