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 A319987 #7 Oct 08 2018 08:09:06
%S A319987 1,3,5,9,11,15,17,27,25,33,5,45,11,51,55,81,2,75,5,99,85,15,17,135,
%T A319987 121,33,125,153,11,165,17,243,25,6,187,225,11,15,55,297,2,255,5,45,
%U A319987 275,51,17,405,289,363,10,99,11,375,55,459,25,33,5,495,11,51,425,729,121,75,5,18,85,561,17,675,2,33,605,45,85,165,17,891,625,6,5
%N A319987 Fully multiplicative with a(p^e) = prime(p mod 8)^e.
%C A319987 For all i, j: a(i) = a(j) => A319984(i) = A319984(j).
%H A319987 Antti Karttunen, <a href="/A319987/b319987.txt">Table of n, a(n) for n = 1..10000</a>
%H A319987 Antti Karttunen, <a href="/A319987/a319987.txt">Data supplement: n, a(n) computed for n = 1..100000</a>
%o A319987 (PARI) A319987(n) = { my(f=factor(n)); prod(i=1, #f~, (prime(f[i, 1]%8))^f[i, 2]); };
%Y A319987 Cf. A319984, A319985, A319986.
%K A319987 nonn,mult
%O A319987 1,2
%A A319987 _Antti Karttunen_, Oct 06 2018