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A101876 Number of Abelian groups of order 4n. 2
2, 3, 2, 5, 2, 3, 2, 7, 4, 3, 2, 5, 2, 3, 2, 11, 2, 6, 2, 5, 2, 3, 2, 7, 4, 3, 6, 5, 2, 3, 2, 15, 2, 3, 2, 10, 2, 3, 2, 7, 2, 3, 2, 5, 4, 3, 2, 11, 4, 6, 2, 5, 2, 9, 2, 7, 2, 3, 2, 5, 2, 3, 4, 22, 2, 3, 2, 5, 2, 3, 2, 14, 2, 3, 4, 5, 2, 3, 2, 11, 10, 3, 2, 5, 2, 3, 2, 7, 2, 6, 2, 5, 2, 3, 2, 15, 2, 6, 4, 10, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Antti Karttunen, Table of n, a(n) for n = 1..65537

FORMULA

a(n) = A000688(4*n). - Antti Karttunen, Sep 27 2018

PROG

(PARI) A101876(n) = factorback(apply(e -> numbpart(e), factor(4*n)[, 2])); \\ Antti Karttunen, Sep 27 2018

CROSSREFS

Bisection of A101872, quadrisection of A000688.

Cf. A000041.

Sequence in context: A056927 A094290 A265111 * A260218 A087986 A129088

Adjacent sequences:  A101873 A101874 A101875 * A101877 A101878 A101879

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jan 28 2005

EXTENSIONS

More terms from Joshua Zucker, May 10 2006

STATUS

approved

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Last modified January 16 23:44 EST 2019. Contains 319206 sequences. (Running on oeis4.)