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 A114001 #16 Dec 04 2023 06:38:08 %S A114001 1,3,5,9,25,33,65,225,257,513,1665,2049,5121,12801,16385,32769,100353, %T A114001 180225,262145,794625,1048577,2097153,7634945,8388609,18874369, %U A114001 50462721,67108865,171966465,403177473,536870913,1073741825 %N A114001 Rows of A114000 expressed as decimals (a sequence related to the number of divisors of 2n-1). %H A114001 Paolo Xausa, <a href="/A114001/b114001.txt">Table of n, a(n) for n = 0..1000</a> %e A114001 a(5)=25 converts to 11001 in binary, which has sum of digits equal to 3, and 9=2*5-1 has 3 divisors. %t A114001 A114001[n_]:=FromDigits[Boole[Divisible[2n+1,2Range[0,n]+1]],2]; %t A114001 Array[A114001,50,0] (* _Paolo Xausa_, Dec 04 2023 *) %Y A114001 Cf. A114000, A099774 (binary weight), A339916 (bit reversal). %K A114001 easy,nonn %O A114001 0,2 %A A114001 _Paul Barry_, Nov 12 2005 %E A114001 Edited by _N. J. A. Sloane_, Dec 23 2020 %E A114001 Offset changed to 0 by _Paolo Xausa_, Dec 04 2023