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 A363831 #17 Oct 21 2023 23:38:57
%S A363831 1,2,2,6,2,8,3,16,4,8,2,72,2,12,12,40,4,32,4,96,12,16,4,384,8,16,16,
%T A363831 144,2,288,8,96,8,32,12,1536,8,16,16,1024,2,288,4,384,96,32,4,3840,12,
%U A363831 64,32,192,2,256,32,768,32,8,2,41472,8,64,96,896,64,256,4
%N A363831 Number of divisors of A000129(n) (Pell numbers).
%H A363831 Amiram Eldar, <a href="/A363831/b363831.txt">Table of n, a(n) for n = 1..630</a> (calculated using Jon E. Schoenfield's a-file at A000129)
%F A363831 a(n) = sigma0(Pell(n)) = A000005(A000129(n)).
%e A363831 a(9)=4 because Pell(9)=985 has divisors {1, 5, 197, 985}.
%t A363831 DivisorSigma[0,LinearRecurrence[{2,1},{1,2},67]] (* _Stefano Spezia_, Oct 19 2023 *)
%Y A363831 Cf. A000005, A000129, A272040, A363829.
%K A363831 nonn
%O A363831 1,2
%A A363831 _Tyler Busby_, Oct 19 2023