This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A193339 #20 Nov 06 2017 02:46:14
%S A193339 1,3,4,5,7,9,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,
%T A193339 89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,
%U A193339 179,181,191,193,197,199,211,223,227,229,233,239,241
%N A193339 Indices of record values in A001783.
%C A193339 Indices k such that A001783(k) is larger than all preceding terms of that sequence. The corresponding values A001783(k) are given in A193338.
%C A193339 It appears that, except for 1, 2, 4, and 9, this is all and only the primes. (It certainly includes all odd primes.) - _Franklin T. Adams-Watters_, Aug 11 2011
%C A193339 It appears that this is the sequence of indices of records in A206369. - _Michel Marcus_, Nov 04 2017
%H A193339 Michael De Vlieger, <a href="/A193339/b193339.txt">Table of n, a(n) for n = 1..10000</a>
%t A193339 Block[{s = Table[Times @@ Select[Range@ n, CoprimeQ[n, #] &], {n, 250}], t}, t = Union@ FoldList[Max, s]; Map[FirstPosition[s, #][[1]] &, t]] (* or *)
%t A193339 Union[Prime@ Range[2, 53], Range[3]^2] (* _Michael De Vlieger_, Nov 04 2017 *)
%o A193339 (PARI) m=0;for(n=1,599,m+0<(m=max(m,A001783(n))) & print1(n", "))
%Y A193339 Cf. A067126.
%K A193339 nonn
%O A193339 1,2
%A A193339 _M. F. Hasler_, Jul 23 2011