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 A328834 #11 Nov 01 2019 18:39:33
%S A328834 1,3,5,15,25,75,7,21,35,105,175,525,49,147,245,735,1225,3675,343,1029,
%T A328834 1715,5145,8575,25725,11,33,55,165,275,825,77,231,385,1155,1925,5775,
%U A328834 539,1617,2695,8085,13475,40425,3773,11319,18865,56595,94325,282975,121,363,605,1815,3025,9075,847,2541,4235,12705,21175,63525,5929,17787
%N A328834 Square root of the prime factor form (A276086) of the primorial base expansion, computed for such numbers for which it is a square.
%C A328834 All terms are odd.
%H A328834 Antti Karttunen, <a href="/A328834/b328834.txt">Table of n, a(n) for n = 1..9072</a>
%H A328834 <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>
%F A328834 a(n) = A276086(A328770(n)) = A000196(A276086(A328849(n))).
%t A328834 With[{b = MixedRadix[Reverse@ Prime@ Range@ 20]}, Select[Array[Sqrt@ Function[k, Times @@ Power @@@ # &@ Transpose@ {Prime@ Range@ Length@ k, Reverse@ k}]@ IntegerDigits[#, b] &, 10^3, 0], IntegerQ]] (* _Michael De Vlieger_, Oct 30 2019 *)
%Y A328834 Cf. A000196, A276086, A328849, A328770.
%K A328834 nonn
%O A328834 1,2
%A A328834 _Antti Karttunen_, Oct 30 2019