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A272122 a(n) is the number of positive divisors of A003266(n). 2
1, 1, 2, 4, 8, 20, 40, 120, 288, 864, 1728, 4800, 9600, 28800, 84480, 304128, 608256, 2322432, 9289728, 40642560, 116121600, 348364800, 696729600, 3185049600, 8918138880, 26754416640, 149824733184, 624269721600, 1248539443200, 6522981580800, 26091926323200, 107629196083200 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
LINKS
FORMULA
a(n) = A000005(A003266(n)).
a(n+1) = 2*a(n) when n is in A069744.
MATHEMATICA
a[n_] := DivisorSigma[0, Fibonorial[n]]; Array[a, 32] (* Amiram Eldar, Aug 09 2022 *)
PROG
(PARI) a(n) = numdiv(prod(k=1, n, fibonacci(k)));
CROSSREFS
Sequence in context: A282953 A283047 A236397 * A323019 A105319 A051389
KEYWORD
nonn,easy
AUTHOR
Altug Alkan, Apr 28 2016
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)