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 A356397 #10 Aug 07 2022 15:37:00 %S A356397 1,1,2,3,4,4,6,7,8,8,16,24,12,12,14,15,16,16,32,48,64,64,96,112,24,24, %T A356397 48,72,28,28,30,31,32,32,64,96,128,128,192,224,256,256,512,768,384, %U A356397 384,448,480,48,48,96,144,192,192,288,336,56,56,112,168,60,60,62 %N A356397 a(n) is the product of the terms in the n-th row of triangle A343835; a(0) = 1. %H A356397 Rémy Sigrist, <a href="/A356397/b356397.txt">Table of n, a(n) for n = 0..8192</a> %H A356397 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a> %F A356397 a(2*n) = a(n) * A277561(n). %F A356397 a(n) = n iff n belongs to A023758 \ {0}. %F A356397 A246674(n) divides a(n). %e A356397 For n = 11: %e A356397 - row 11 of A343835 is (8, 3), %e A356397 - so a(11) = 8 * 3 = 24. %o A356397 (PARI) a(n) = { my (v=1); while (n, my (z=valuation(n, 2), o=valuation(n/2^z+1, 2), r=(2^o-1)*2^z); n-=r; v*=r); v } %Y A356397 Cf. A023758, A059867, A246674, A277561, A343835. %K A356397 nonn,base %O A356397 0,3 %A A356397 _Rémy Sigrist_, Aug 05 2022