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 A349732 #8 Nov 28 2021 12:59:47 %S A349732 1,2,3,4,5,6,7,8,9,19,0,24,0,25,32,26,0,27,0,28,34,29,0,35,50,0,36,43, %T A349732 0,37,0,44,38,0,52,39,0,0,0,46,0,61,0,47,54,0,0,48,70,55,0,49,0,63,56, %U A349732 71,0,0,0,57,0,0,72,80,58,65,0,0,0,59,0,66,0,0,0,0,74,67,0,82,90 %N A349732 Smallest k such that A349194(k) = n, or 0 if no such k exists. %C A349732 Composite numbers m for which a(m) = 0 are in A349733. %F A349732 If p prime >= 11, a(p) = 0. %e A349732 a(10) = 19 since 1*(1+9) = 10 and no integer du < 19 gives d*(d+u) = 10. %Y A349732 Cf. A349194, A349733. %K A349732 nonn,base %O A349732 1,2 %A A349732 _Bernard Schott_, Nov 28 2021