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 A358993 #4 Dec 11 2022 12:01:38
%S A358993 1,1,1,2,3,3,4,6,7,9,10,12,12,13,15,18,17,20,21,22,24,25,27,29,31,32,
%T A358993 34,34,35,40,40,45,45,45,46,47,46,52,55,55,59,58,60,59,66,66,65,69,70,
%U A358993 74,80,79,84,75,83,90,89,87,92,95,91,95,104,98,102,110,107
%N A358993 a(n) is the number of nonzero digits in the product of the first n odd numbers not divisible by 5.
%F A358993 a(n) = A055640(A358990(n)).
%t A358993 Table[Length[Select[IntegerDigits[Product[2i+2Floor[(i-3)/4]+1, {i, n}]], Positive]], {n, 0, 66}]
%Y A358993 Cf. A045572, A055640, A356861, A358990.
%Y A358993 Cf. A358991 (number of zero digits), A358992 (number of digits).
%K A358993 nonn,base
%O A358993 0,4
%A A358993 _Stefano Spezia_, Dec 09 2022