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 A167522 #8 Jul 29 2024 16:28:21
%S A167522 3,5,6,11,12,13,15,16,19,21,25,27,28,29,32,33,35,37,39,40,42,45,47,53,
%T A167522 54,55,58,60,65,72,73,74,76,78,79,81,82,84,85,88,90,92,93,96,98,102,
%U A167522 105,106,108,112,115,116,117,118,121,122,123,127,128,130,133,134,139,141
%N A167522 Positive integers not occurring in A167500.
%C A167522 Equivalently, positions of zero digits in A167502 (when all terms are concatenated).
%o A167522 (PARI) {a=b=[]; for(n=1,99, #b>=n & for(i=a[n-1]+1,#b,b[i] & (a=concat(a,i)) & break); #a<n & a=concat(a,#b+1); b=concat(b,binary(a[n]))); for(i=1,#b, b[i] || print1(i","))}
%Y A167522 Cf. A167500-A167503, A167520-A167523.
%K A167522 nonn,base
%O A167522 1,1
%A A167522 _M. F. Hasler_, Nov 05 2009