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 A258975 #13 Jun 29 2015 18:33:58
%S A258975 1,2,3,5,11,10,29,78,141,266,147,194,1181,2413,1834,6293,4805,20290,
%T A258975 28345,25065,85334,87967,55722,191559,385845,437914,998758,396375,
%U A258975 95625,202043,341774,2217782,1607613,1333107,1697893,1222517,2277354,1599111
%N A258975 a(n) = n-th pi-based antiderivative of 1.
%F A258975 a(n) = min { m >= 0 : A258851^n(m) = 1 }.
%F A258975 A258850(a(n),n) = 1.
%e A258975 a(6) = 29 -> 10 -> 11 -> 5 -> 3 -> 2 -> 1.
%e A258975 a(7) = 78 -> 127 -> 31 -> 11 -> 5 -> 3 -> 2 -> 1.
%Y A258975 Row n=1 of A259016.
%Y A258975 Cf. A000720, A258850, A258851.
%K A258975 nonn
%O A258975 0,2
%A A258975 _Alois P. Heinz_, Jun 18 2015