



1, 4, 9, 6, 25, 6, 49, 12, 24, 10, 121, 9, 169, 14
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OFFSET

1,2


COMMENTS

a(n) = n^2 iff n is prime.
a(n) = n iff mu(n) = 1.


LINKS

Table of n, a(n) for n=1..14.


FORMULA

A014963(n) * A063659(n). A140579 as an infinite lower triangular matrix * A063659 as a vector, where A063659 = (1, 2, 3, 3, 5, 6, 7, 6, 8, 10,...)


EXAMPLE

a(4) = 6 = A014963(4) * A063659(4) = 2 * 3.


CROSSREFS

Cf. A140579, A014963, A008683.
Sequence in context: A141553 A095065 A061207 * A152454 A287932 A074767
Adjacent sequences: A140691 A140692 A140693 * A140695 A140696 A140697


KEYWORD

nonn


AUTHOR

Gary W. Adamson & Mats Granvik, May 23 2008


STATUS

approved



