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 A259170 #3 Jun 19 2015 15:48:05
%S A259170 9,23,83,431,3001,27457,10626,112087,87306,172810,280217,390133,
%T A259170 353555,750243,1318106,937023,367542,2615090,3434663,3281065,3270774,
%U A259170 4979697,8021665,4627825,5618666,11169397
%N A259170 a(n) = n-th pi-based antiderivative of 9.
%F A259170 a(n) = min { m >= 0 : A258851^n(m) = 9 }.
%Y A259170 Row n=9 of A259016.
%Y A259170 Cf. A000720, A258851.
%K A259170 nonn
%O A259170 0,1
%A A259170 _Alois P. Heinz_, Jun 19 2015