A319410 Twice A032741.

0, 0, 2, 2, 4, 2, 6, 2, 6, 4, 6, 2, 10, 2, 6, 6, 8, 2, 10, 2, 10, 6, 6, 2, 14, 4, 6, 6, 10, 2, 14, 2, 10, 6, 6, 6, 16, 2, 6, 6, 14, 2, 14, 2, 10, 10, 6, 2, 18, 4, 10, 6, 10, 2, 14, 6, 14, 6, 6, 2, 22, 2, 6, 10, 12, 6, 14, 2, 10, 6, 14, 2, 22, 2, 6, 10, 10, 6, 14, 2, 18, 8, 6, 2, 22, 6, 6, 6, 14, 2, 22, 6, 10, 6, 6, 6, 22, 2, 10, 10, 16

Offset: 0

Author

N. J. A. Sloane, Sep 20 2018

Keywords

• nonn

Comments

For n>0, twice the number of proper divisors of n (d|n, d

Links

• Claude Lenormand, Deux transformations sur les mots, Preprint, 5 pages, Nov 17 2003. Apparently unpublished. This is a scanned copy of the version that the author sent to me in 2003.

Crossrefs

Cf. A032741.

A column of the triangle in A319411.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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