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 A087583 #4 Dec 05 2013 19:56:31 %S A087583 2,3,5,11,7,29,37,103,59,271,19,107,349,127,359,157,419,137,409,701, %T A087583 277,691,257,661,197,641,167,773,97,733,239,1087,461,1117,431,1097, %U A087583 643,1259,613,1451,967,149,977,281,2393,61,919,41,929,31,839,3061,619,1487 %N A087583 Distinct primes such that the absolute values of successive differences are distinct palindromes. a(n+1) is chosen to be < a(n) if such a prime exists, minimizing a(n)-a(n+1); otherwise the minimal a(n+1) > a(n) is chosen. %C A087583 The sequence of absolute differences is 1,2,6,4,22,8,66,44.... Conjecture: this sequence is infinite and contains every even palindrome. %e A087583 a(3) = 11: |11-5| = 6, a palindrome. The primes < 5 are excluded because they have already occurred in the sequence. 7 is excluded because |7-5| = 2 has already occurred as a difference. %Y A087583 Cf. A087581, A087582. %K A087583 base,nonn,easy %O A087583 0,1 %A A087583 _Amarnath Murthy_, Sep 17 2003 %E A087583 Edited and extended by _David Wasserman_, Jun 14 2005