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A133910 Period numbers of A133900 divided by n^2. 55
1, 1, 1, 1, 1, 2, 1, 1, 1, 4, 1, 6, 1, 4, 3, 1, 1, 8, 1, 4, 3, 8, 1, 6, 1, 8, 1, 4, 1, 360, 1, 1, 9, 16, 5, 24, 1, 16, 9, 20, 1, 144, 1, 8, 15, 16, 1, 18, 1, 16, 9, 8, 1, 16, 5, 28, 9, 16, 1, 360, 1, 16, 21, 1, 5, 288, 1, 16, 9, 1120, 1, 24, 1, 32, 9, 16, 7, 288, 1, 20, 1, 64, 1, 6048, 5, 32, 27, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..88.

FORMULA

a(n)=A133900(n)/n^2.

a(n)=1, iff n is a prime or a power of a prime (including n=1).

If a prime p is a factor of a(n), then p is also a factor of n.

EXAMPLE

a(6)=2, since A133900(6)/6^2=72/36=2.

a(18)=8, since A133900(18)/18^2=2592/324=8.

CROSSREFS

Cf. A000040, A100118, A046363, A133620, A133621, A133623, A133630, A133635.

Cf. A133872, A133880, A133890, A133900, A133911.

Sequence in context: A306671 A308210 A112331 * A066441 A300384 A252890

Adjacent sequences:  A133907 A133908 A133909 * A133911 A133912 A133913

KEYWORD

nonn

AUTHOR

Hieronymus Fischer, Oct 20 2007

STATUS

approved

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Last modified May 23 13:32 EDT 2019. Contains 323514 sequences. (Running on oeis4.)