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 A317942 #8 Aug 12 2018 21:25:37
%S A317942 1,2,2,4,2,12,2,8,6,20,2,72,2,28,30,16,2,396,2,200,42,52,2,432,10,68,
%T A317942 66,392,2,17100,2,32,78,92,70,26136,2,116,102,2000,2,54684,2,1352,
%U A317942 6270,148,2,2592,14,3700,138,2312,2,178596,130,5488,174,172,2,9747000,2,188,14322,64,170,322452,2,4232,222,289100,2,1724976,2
%N A317942 a(n) = Product_{d|n, d<n} prime(A286378(d)-1).
%H A317942 Antti Karttunen, <a href="/A317942/b317942.txt">Table of n, a(n) for n = 1..8192</a>
%H A317942 <a href="/index/St#Stern">Index entries for sequences related to Stern's sequences</a>
%F A317942 a(n) = Product_{d|n, d<n} A008578(A286378(d)).
%F A317942 For all k >= 0, a(2^k) = 2^k.
%o A317942 (PARI)
%o A317942 \\ Needs also code from A286378:
%o A317942 A317942(n) = { my(m=1); fordiv(n,d,if(d<n, m *= prime(A286378(d)-1))); (m); };
%Y A317942 Cf. A286378, A317943 (restricted growth sequence transform), A317944.
%Y A317942 Cf. also A293216, A305792.
%K A317942 nonn
%O A317942 1,2
%A A317942 _Antti Karttunen_, Aug 12 2018