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 A219251 #10 Apr 14 2013 10:50:57
%S A219251 10,11,12,15,17,19,21,22,23,26,28,32,33,34,37,39,40,43,44,45,48,51,54,
%T A219251 55,56,59,60,62,65,66,67,71,73,76,77,78,80,82,84,87,88,89,90,91,93,95,
%U A219251 98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129
%N A219251 Numbers such that the absolute difference of a pair of adjacent decimal digits is not prime.
%C A219251 Complement of A219248; numbers which do not occur in A219249 and A219250; analog of what is A219110 to A182177, A182178.
%o A219251 (PARI) is_A219251(n)={for(i=2, #n=digits(n), isprime(abs(n[i-1]-n[i]))||return(1))}
%K A219251 nonn,base,easy
%O A219251 1,1
%A A219251 _M. F. Hasler_, Apr 11 2013