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 A128703 #9 Sep 08 2022 08:45:30
%S A128703 10,15,35,50,55,65,75,85,95,115,145,155,175,185,205,215,235,250,265,
%T A128703 275,295,305,325,335,355,365,375,395,415,425,445,475,485,505,515,535,
%U A128703 545,565,575,635,655,685,695,725,745,755,775,785,815,835,865,875,895,905
%N A128703 Numbers of the form 5^k*p, where 1 <= k <= 5 and p is a prime different from 5.
%C A128703 Auxiliary sequence for A128704 which gives the number of groups of order a(n).
%H A128703 Klaus Brockhaus, <a href="/A128703/b128703.txt">Table of n, a(n) for n=1..10000</a>
%e A128703 375 = 5^3*3 is a term.
%t A128703 With[{upto=1000},Select[Union[Flatten[5^Range[5] #&/@Drop[Prime[ Range[ PrimePi[ Ceiling[upto/5]]]],{3}]]],#<=upto&]] (* _Harvey P. Dale_, Jul 27 2011 *)
%o A128703 (Magma) [ n: n in [1..910] | #t eq 2 and ((t[1, 1] lt 5 and t[1, 2] eq 1 and t[2, 1] eq 5 and t[2, 2] le 5) or (t[1, 1] eq 5 and t[1, 2] le 5 and t[2, 2] eq 1)) where t is Factorization(n) ];
%Y A128703 Cf. A128704, A000351 (powers of 5).
%K A128703 nonn
%O A128703 1,1
%A A128703 _Klaus Brockhaus_, Mar 26 2007