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 A069556 #6 Dec 05 2013 19:55:15 %S A069556 2,3,5,7,23,29,41,43,47,61,67,83,89,347,349,367,383,389,641,643,647, %T A069556 661,683,929,941,947,967,983,2341,2347,2381,2383,2389,2621,2647,2663, %U A069556 2683,2687,2689,2927,2963,2969,4327,4349,4363,4621,4643,4649,4663,4943 %N A069556 Primes in which the k-th digit (counting from the right) is either a nonzero multiple of k or a divisor of k; furthermore the digit 1 is allowed only when k has no other divisors < 10. %e A069556 The prime 52627 is a member because 7 is a multiple of 1, 2 %e A069556 is a multiple of 2, 6 is a multiple of 3, 2 is a divisor of 4 and 5 is a multiple of 5. %Y A069556 Cf. A008364. %K A069556 base,nonn,easy %O A069556 1,1 %A A069556 _Amarnath Murthy_, Mar 22 2002 %E A069556 Edited by _David Wasserman_, Nov 03 2005