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 A083470 #25 Oct 05 2021 21:06:05 %S A083470 2,23,257,2357,235723,23571143,2357111371,235711131767,23571113172367, %T A083470 2357111317192343,235711131719233171,23571113171923296797, %U A083470 2357111317192329314189,235711131719232931375979,23571113171923293137414371,2357111317192329313741436167 %N A083470 Smallest prime which is the concatenation of n distinct primes in increasing order. %C A083470 Perhaps the n-th term begins with the concatenation of the first (n-1) primes, except for n = 3. %C A083470 The 9th, 11th, 12th, 13th, .... terms are other counterexamples to the above "conjecture". On the other hand, it seems almost sure that the n-th term starts with the concatenation of the first (n-2) primes. - _M. F. Hasler_, Mar 20 2011 %Y A083470 Cf. A069837, A083427. %K A083470 base,nonn %O A083470 1,1 %A A083470 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 02 2003 %E A083470 More terms from _David Wasserman_, Nov 02 2004