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 A022333 #15 Feb 07 2020 09:03:29
%S A022333 0,0,0,1,0,1,0,1,2,0,1,2,0,1,2,3,0,1,2,3,0,1,2,3,0,4,1,2,3,0,4,1,2,3,
%T A022333 0,4,1,5,2,3,0,4,1,5,2,3,0,4,1,5,2,6,3,0,4,1,5,2,6,3,0,4,1,5,2,6,3,0,
%U A022333 7,4,1,5,2,6,3,0,7,4,1,5,2,6,3,0,7,4,1,8,5,2,6,3,0,7,4,1,8,5,2,6,3,0,7,4,1,8,5,2
%N A022333 Exponent of 5 (value of j) in n-th number of form 2^i*5^j.
%H A022333 Amiram Eldar, <a href="/A022333/b022333.txt">Table of n, a(n) for n = 1..10000</a>
%F A022333 a(n) = A112765(A003592(n)). - _Amiram Eldar_, Feb 07 2020
%p A022333 A022333 := proc(n)
%p A022333 A112765(A003592(n)) ;
%p A022333 end proc:
%p A022333 seq(A022333(n),n=1..20) ; # _R. J. Mathar_, Aug 04 2016
%t A022333 s = {}; m = 12; Do[n = 5^k; While[n <= 5^m, AppendTo[s, n]; n *= 2], {k, 0, m}]; IntegerExponent[#, 5] & /@ Union[s]
%o A022333 (PARI) lista(nn) = {vec = vector(nn, i , i); subset = select(n->(n/(2^valuation(n,2)*5^valuation(n,5)) == 1), vec); for (i = 1, #subset, print1(valuation(subset[i], 5), ", "););} \\ _Michel Marcus_, Oct 01 2013
%Y A022333 Cf. A003592, A022332, A112765.
%K A022333 nonn
%O A022333 1,9
%A A022333 _Clark Kimberling_