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 A173422 #11 Apr 04 2018 20:22:17
%S A173422 1,2,3,5,11,31,130,776,6750,78635,1131440,18580739,331953037
%N A173422 Partials sums of A003094 (unlabeled connected planar simple graphs with n nodes).
%C A173422 Partials sums of number of unlabeled connected planar simple graphs with n nodes. The subsequence of primes in these partial sums begins: 2, 3, 5, 11, 31.
%F A173422 a(n) = Sum_{i=0..n} A003094(i).
%e A173422 a(11) = 1 + 1 + 1 + 2 + 6 + 20 + 99 + 646 + 5974 + 71885 + 1052805 + 17449299.
%o A173422 (PARI) S=0; A173422=apply(t->S+=t,A003094) \\ with A003094 defined as vector of the initial terms of that sequence. - _M. F. Hasler_, Mar 20 2018
%Y A173422 Cf. A003094, inverse Euler transform of A005470, A126201.
%K A173422 hard,nonn
%O A173422 0,2
%A A173422 _Jonathan Vos Post_, Feb 18 2010
%E A173422 Edited and a(12) added by _M. F. Hasler_, Mar 20 2018