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 A205529 #13 Feb 01 2022 00:44:36 %S A205529 0,1,2,3,5,7,109,1009,10009,1000000009,1000000000000000009, %T A205529 10000000000000000000009 %N A205529 Noncomposite k-digit numbers m such that each sum of 1 - k digits of m is a substring of m. %C A205529 Complement of A205530 with respect to A202272. %C A205529 a(n) for n>=3 is a subsequence of A052019 (sum of digits of prime p is substring of p). %e A205529 109 is a term because all possible sums of digits 0, 1, 1, 9, 9, 10 are its substrings. %Y A205529 Cf. A205530, A202272, A052019. %K A205529 nonn,base,more %O A205529 1,3 %A A205529 _Jaroslav Krizek_, Jan 28 2012