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 A101253 #8 Jan 03 2013 12:39:31 %S A101253 2,19,113,617,1877,8753,52517,255043,1532173,9287521,48499459, %T A101253 353653063,2136716521,18171787987,111795382441 %N A101253 a(n) = n-th prime of Erdős-Selfridge classification n+. %C A101253 Diagonalization of the Erdős-Selfridge classification of primes n+. See A101231 for diagonalization of the Erdős-Selfridge classification of primes n-. %D A101253 R. K. Guy, Unsolved Problems in Number Theory, A18. %e A101253 a(1) = 2 because 2 is the first element of A005105. %e A101253 a(2) = 19 because 19 is the 2nd element of A005106. %e A101253 a(3) = 113 because 113 is the 3rd element of A005107. %e A101253 a(4) = 617 because 617 is the 4th element of A005108. %e A101253 a(5) = 1877 because 1877 is the 5th element of A081633. %e A101253 a(6) = 8753 because 8753 is the 6th element of A081634. %Y A101253 Cf. A101231, A005105, A005106, A005107, A005108, A081633, A081634, A081635, A081636, A081637, A081638, A081639, A005113, A019268. %Y A101253 Cf. A084071, A090468, A129474, A129475. %K A101253 nonn %O A101253 1,1 %A A101253 _Jonathan Vos Post_, Dec 16 2004 %E A101253 More terms from _David Wasserman_, Mar 26 2008