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 A029944 #11 May 09 2017 18:27:02
%S A029944 5,6,5,24,34,37,42,14,48,23,56,61,21,66,69,73,77,19,26,131,86,89,94,
%T A029944 17,176,318,321,226,331,337,113,146,371,118,339,123,397,128,409,416,
%U A029944 134,426,438,44,346,447,46,473,472,479,483,352,79,501,507,513,519
%N A029944 a(n)^2 contains n-th prime as a substring.
%H A029944 John Cerkan, <a href="/A029944/b029944.txt">Table of n, a(n) for n = 1..10000</a>
%e A029944 E.g. 34^2 = 1156 is first square that contains the string "11".
%t A029944 With[{e = 2}, Table[Function[p, k = 1; While[Length@ SequencePosition[ IntegerDigits[Set[c, k^e]], p] == 0, k++]; c]@ IntegerDigits@ Prime@ n, {n, 57}] ^(1/e)] (* _Michael De Vlieger_, May 04 2017, Version 10.1 *)
%Y A029944 Cf. A038690, A068165.
%K A029944 nonn,base
%O A029944 1,1
%A A029944 _Patrick De Geest_