A118086 Number of ways 3/2 is a product of n superparticular ratios, without regard to order. A superparticular ratio is a ratio of the form m/(m-1).

1, 2, 14, 229, 9393, 1474291

Offset

1,2

Comments

The computations were made using Maple and a program of David Canright. The sequence relates to music theory, as 3/2 is the interval of a fifth in music and the sequence enumerates various ways of subdividing a fifth using superparticular intervals.

Links

Table of n, a(n) for n=1..6.

Crossrefs

Cf. A085098.

Sequence in context: A251692 A338187 A323693 * A048163 A093548 A052215

Adjacent sequences: A118083 A118084 A118085 * A118087 A118088 A118089

Keyword

hard,more,nonn

Author

Gene Ward Smith, Apr 14 2006

Status

approved