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A143525 a(n) = the number of divisors of (A005179(n)-1), where A005179(n) is the smallest positive integer with n divisors. 1
1, 2, 2, 4, 2, 6, 2, 4, 2, 8, 2, 24, 2, 4, 4, 16, 2, 32, 2, 6, 4, 16, 2, 8, 4, 4, 4, 64, 2, 96, 2, 8, 4, 4, 2, 512, 2, 4, 4, 192, 2, 144, 2, 4, 6, 16, 4, 16, 8, 8, 8, 128, 2, 12, 2, 16, 4, 64, 2, 4608, 4, 12, 2, 12, 8, 384, 4, 8, 2, 512, 2, 8192, 16, 4, 16, 8, 8, 192, 4, 8, 4, 32, 4, 24, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..86.

FORMULA

a(n) = A000005(A005179(n)-1). [From Ray Chandler, Oct 11 2008]

CROSSREFS

Cf. A005179, A143526.

Sequence in context: A289624 A258446 A054704 * A086087 A284476 A082174

Adjacent sequences: A143522 A143523 A143524 * A143526 A143527 A143528

KEYWORD

nonn

AUTHOR

Leroy Quet, Aug 22 2008

EXTENSIONS

Extended by Ray Chandler, Oct 11 2008

STATUS

approved

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Last modified February 7 12:25 EST 2023. Contains 360116 sequences. (Running on oeis4.)