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 A022334 #21 Feb 09 2023 04:58:24
%S A022334 1,4,9,16,26,38,52,69,88,109,133,159,187,218,251,286,324,364,406,451,
%T A022334 498,547,599,653,709,768,829,892,958,1026,1096,1168,1243,1320,1399,
%U A022334 1481,1565,1651,1740,1831,1924,2020,2118,2218,2321,2426,2533,2643,2755,2869,2986
%N A022334 Index of 5^n within sequence of numbers of form 2^i * 5^j.
%C A022334 Greedy inverse of A022333: a(n) = min{k: A022333(k) = n}. - _R. J. Mathar_, Aug 04 2016
%H A022334 Michael De Vlieger, <a href="/A022334/b022334.txt">Table of n, a(n) for n = 0..10000</a>
%F A022334 a(n) = Sum_{i=0..n} 1 + floor(log(5^i)/log(2)). - _Michel Marcus_, Oct 02 2013
%t A022334 Table[1 + Sum[Ceiling[j*Log[2, 5]], {j, i}], {i, 0, 50}] (* _Michael De Vlieger_, Feb 08 2023 *)
%o A022334 (PARI) a(n) = sum(i=0, n, 1 + floor(log(5^i)/log(2))); \\ _Michel Marcus_, Oct 02 2013
%Y A022334 Cf. A003592, A022335.
%K A022334 nonn
%O A022334 0,2
%A A022334 _Clark Kimberling_