A272377 Number of positive divisors of A000032(n).

2, 1, 2, 3, 2, 2, 6, 2, 2, 6, 4, 2, 8, 2, 4, 12, 2, 2, 16, 2, 4, 12, 8, 4, 8, 8, 4, 12, 6, 4, 24, 2, 4, 12, 8, 16, 16, 2, 4, 24, 8, 2, 48, 4, 16, 96, 8, 2, 16, 4, 16, 24, 8, 2, 40, 24, 4, 24, 8, 8, 64, 2, 4, 96, 4, 32, 48, 4, 4, 48, 16, 2, 16, 4, 8, 192, 4, 16, 24, 2, 4, 48, 16, 4, 96, 16, 4, 48, 8, 4, 128

Offset: 0

Author

Altug Alkan, Apr 28 2016

Keywords

• nonn
• easy

Examples

			a(3) = 3 because A000032(3) = 4 and 4 is divisible by 1, 2 and 4.
		

Links

• Amiram Eldar, Table of n, a(n) for n = 0..1000 (using Blair Kelly's data)
• Blair Kelly, Fibonacci and Lucas Factorizations

Crossrefs

Cf. A000005, A000032, A063375.

Programs

Mathematica

DivisorSigma[0, LucasL /@ Range[0, 90]] (* Michael De Vlieger, Apr 28 2016 *)

PARI

a(n) = numdiv(fibonacci(n-1)+fibonacci(n+1));

Formula

a(n) = A000005(A000032(n)).