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 A219250 #17 Dec 23 2024 14:53:43
%S A219250 0,2,4,1,3,5,7,9,6,8,13,14,16,18,30,20,24,25,27,29,41,31,35,36,38,50,
%T A219250 52,42,46,47,49,61,63,53,57,58,64,68,69,70,72,74,75,79,202,92,94,96,
%U A219250 81,83,85,86,97,203,130,205,207,241,302,413,131,303,135,242,414,136,138,141,305,246,142,416,146,147,247,249
%N A219250 Lexicographically earliest sequence of nonnegative integers such that the absolute difference of any two adjacent digits is prime.
%C A219250 See A219249 for the version allowing only positive integers, i.e., starting with a(1)=1.
%C A219250 See A219248 (= range of A219250) for the numbers which occur in this sequence, and A219251 for the complement.
%C A219250 A182177 is the analog of this sequence for replacing "absolute difference" by "sum", A182178 is the same analog for A219249; A182175 is the analog of A219248 and A219110 corresponds to A219251.
%H A219250 M. F. Hasler in reply to E. Angelini, <a href="https://web.archive.org/web/*/http://list.seqfan.eu/oldermail/seqfan/2013-April/011036.html">Re: Any digit-pair in S sums to a prime</a>, SeqFan list, Apr 11 2013
%o A219250 (PARI) {(n,a=[0],u=0)->while(#a<n,u+=1<<a[#a];for(t=a[1]+1,9e9,bittest(u,t)&next;my(d=concat(a[#a]%10,digits(t)));for(i=2,#d,isprime(abs(d[i-1]-d[i]))||next(2));a=concat(a,t);break));a}
%K A219250 nonn,base
%O A219250 1,2
%A A219250 _M. F. Hasler_, Apr 11 2013