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A272122
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a(n) is the number of positive divisors of A003266(n).
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2
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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
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OFFSET
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1,3
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LINKS
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FORMULA
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a(n+1) = 2*a(n) when n is in A069744.
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MATHEMATICA
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a[n_] := DivisorSigma[0, Fibonorial[n]]; Array[a, 32] (* Amiram Eldar, Aug 09 2022 *)
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PROG
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(PARI) a(n) = numdiv(prod(k=1, n, fibonacci(k)));
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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