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 A025637 #7 Jul 06 2025 10:13:34 %S A025637 0,1,2,0,3,1,4,2,5,0,3,6,1,4,7,2,5,8,0,3,6,9,1,4,7,10,2,5,8,11,0,3,6, %T A025637 9,12,1,4,7,10,13,2,5,8,11,14,0,3,6,9,12,15,1,4,7,10,13,16,2,5,8,11, %U A025637 14,0,17,3,6,9,12,15,1,18,4,7,10,13,16,2,19,5,8,11,14,0,17,3,20,6,9,12,15,1 %N A025637 Exponent of 2 (value of i) in n-th number of form 2^i*7^j. %Y A025637 Cf. A003591. %K A025637 nonn %O A025637 1,3 %A A025637 _David W. Wilson_