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 A119424 #3 Mar 30 2012 18:40:37 %S A119424 3,18,84,373,1410 %N A119424 Length of primes formed by the initial decimal digits of the base e expansion of Pi. %e A119424 a(1) = 3 because the first 3 digits of the base e expansion of Pi are 10.1 [meaning pi ~ 1*(e^1) + 0*(e^0) + 1*(e^-1)] and 101 (base 10) is prime. %e A119424 a(2) = 18 because the first 18 digits of the base e expansion of Pi are 1, 0, 1010020200021111 which (base 10) is prime. %e A119424 a(3) = 84 because there are 84 digits in 101010020200021111200201011200010102020001110120200101200020011011201012100100021001 which is prime. %Y A119424 Cf. A000040, A005042, A050948. %K A119424 base,nonn %O A119424 1,1 %A A119424 _Jonathan Vos Post_, Jul 26 2006