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 A338580 #11 Nov 07 2020 03:09:08 %S A338580 1,2,3,3,4,5,5,4,5,6,7,6,5,7,8,7,7,8,7,11,9,10,11,10,13,9,11,10,11,13, %T A338580 12,9,11,13,13,11,9,12,13,11,14,10,11,15,9,14,16,17,7,8,19,11,12,13, %U A338580 14,15,18,19,16,15,14,13,12,21,9,8,15,20,19,17,11,19,14 %N A338580 Numerators of resistance values that can be obtained from a network of exactly 10 one-ohm resistors, but not from any network with fewer than 10 one-ohm resistors. Denominators are in A338590. %C A338580 The A338197(k)/2 initial terms of this sequence are also the numerators of the corresponding sorted lists of resistance values that can be achieved by exactly k resistors for all k < 10. %H A338580 Hugo Pfoertner, <a href="/A338580/b338580.txt">Table of n, a(n) for n = 1..2639</a> %e A338580 See A338590. %Y A338580 Cf. A180414, A338197, A338590. %Y A338580 The initial terms of this sequence are also the numerators to be used together with the denominators given in A338595, A338596, A338597, A338598, A338599. %K A338580 nonn,frac,fini,full,look %O A338580 1,2 %A A338580 _Hugo Pfoertner_, Nov 06 2020