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 A025653 #16 Jul 09 2025 12:51:31
%S A025653 0,1,0,2,1,0,3,2,1,0,4,3,2,1,5,0,4,3,2,6,1,5,0,4,3,7,2,6,1,5,0,4,8,3,
%T A025653 7,2,6,1,5,9,0,4,8,3,7,2,6,10,1,5,9,0,4,8,3,7,11,2,6,10,1,5,9,0,4,8,
%U A025653 12,3,7,11,2,6,10,1,5,9,0,13,4,8,12,3,7,11,2,6,10,1,14,5,9,0,13,4,8,12,3,7,11,2
%N A025653 Exponent of 5 (value of i) in n-th number of form 5^i*8^j.
%H A025653 Amiram Eldar, <a href="/A025653/b025653.txt">Table of n, a(n) for n = 1..10000</a>
%H A025653 <a href="/index/Se#sequences_which_agree_for_a_long_time">Index entries for sequences which agree for a long time but are different</a>.
%F A025653 a(n) = A112765(A025623(n)). - _Amiram Eldar_, Jul 09 2025
%t A025653 With[{max = 10^11}, IntegerExponent[Sort[Flatten[Table[5^i*8^j, {i, 0, Log[5, max]}, {j, 0, Log[8, max/5^i]}]]], 5]] (* _Amiram Eldar_, Jul 09 2025 *)
%Y A025653 Cf. A025623, A025673, A112765.
%Y A025653 Differs from A025647 at a(2805).
%K A025653 nonn
%O A025653 1,4
%A A025653 _David W. Wilson_