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 A006350 M4388 #12 Jul 08 2025 16:47:29
%S A006350 0,1,7,27,101,337,1151,3843,12965,43773,148529,505605,1727771,5920823,
%T A006350 20345445,70073901,241849929,836230109,2896104951,10044664507,
%U A006350 34884102385,121293088909,422196245641,1471030361069,5130057477187,17905427995239
%N A006350 Related to series-parallel networks.
%D A006350 Z. A. Lomnicki, Two-terminal series-parallel networks, Adv. Appl. Prob., 4 (1972), 109-150.
%D A006350 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%F A006350 Sum_{k=1..n-1} A000084(k)*A006349(n-k), n >= 2.
%Y A006350 Cf. A000084, A006349, A058351, A058352, A058353, A000669.
%K A006350 nonn,easy
%O A006350 1,3
%A A006350 _N. J. A. Sloane_