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 A272122 #67 Aug 09 2022 07:08:09 %S A272122 1,1,2,4,8,20,40,120,288,864,1728,4800,9600,28800,84480,304128,608256, %T A272122 2322432,9289728,40642560,116121600,348364800,696729600,3185049600, %U A272122 8918138880,26754416640,149824733184,624269721600,1248539443200,6522981580800,26091926323200,107629196083200 %N A272122 a(n) is the number of positive divisors of A003266(n). %H A272122 Amiram Eldar, <a href="/A272122/b272122.txt">Table of n, a(n) for n = 1..794</a> %F A272122 a(n) = A000005(A003266(n)). %F A272122 a(n+1) = 2*a(n) when n is in A069744. %t A272122 a[n_] := DivisorSigma[0, Fibonorial[n]]; Array[a, 32] (* _Amiram Eldar_, Aug 09 2022 *) %o A272122 (PARI) a(n) = numdiv(prod(k=1, n, fibonacci(k))); %Y A272122 Cf. A000005, A000045, A003266, A027423, A063375, A069744, A260622. %K A272122 nonn,easy %O A272122 1,3 %A A272122 _Altug Alkan_, Apr 28 2016