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 A174137 #4 Oct 02 2021 16:18:47
%S A174137 1,3,16,187,4181,158484,9573673,887796203,123095499826,25013843421773,
%T A174137 7332464142932061,3060854010476035118,1800064413234246359355,
%U A174137 1477862758280253372432667,1680717420907850482529235664
%N A174137 Partial sums of A006905.
%C A174137 Partial sums of number of transitive relations on n labeled nodes. After 3, none of the values shown is prime.
%F A174137 a(n) = Sum_{i=0..n} A006905(i).
%Y A174137 Cf. A006905, A000595, A001173, A091073.
%K A174137 nonn
%O A174137 0,2
%A A174137 _Jonathan Vos Post_, Mar 09 2010