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 A214752 #23 Sep 25 2013 14:48:53 %S A214752 2,3,5,61,379,4337,568049,74401441,135641613564613015742379733, %T A214752 1265128384429601209773279760867, %U A214752 17454716892349876427463772074092822077069402994829708101921142701 %N A214752 Primes in the sequence of tribonacci numbers starting 1, 1, 0 (A081172). %C A214752 Sequence A081172 shows the tribonacci numbers that begin with 1, 1, 0. %Y A214752 Cf. A081172. %K A214752 nonn %O A214752 1,1 %A A214752 _Andrew Jiang_, Aug 02 2012