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 A200063 #16 Jul 19 2020 11:52:08
%S A200063 1,2,8,32,46,392,12230,155942,659488,1025582,1047128,3437088,
%T A200063 1449322158,1452777560,1691887144,4558298126,4840156480,39554086678,
%U A200063 353617531486,608231808384,619986226720,969355365422
%N A200063 Indices n where A079878(n) = n.
%C A200063 a(23) > 4*10^12. - _Donovan Johnson_, Nov 21 2011
%F A200063 {n: A079878(n)=n}.
%e A200063 A079878(46)=46, which adds 46 to the sequence.
%o A200063 (Haskell)
%o A200063 import Data.List (elemIndices)
%o A200063 a200063 n = a200063_list !! (n-1)
%o A200063 a200063_list = map (+ 1) $ elemIndices 0 $ zipWith (-) [1..] a079878_list
%o A200063 -- _Reinhard Zumkeller_, Nov 13 2011
%Y A200063 Cf. A200064
%K A200063 nonn
%O A200063 1,2
%A A200063 _R. J. Mathar_, Nov 13 2011
%E A200063 a(13)-a(22) from _Donovan Johnson_, Nov 21 2011