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A065178
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Number of site swap patterns with 2 balls and exact period n.
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4
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1, 2, 6, 15, 42, 107, 294, 780, 2128, 5781, 15918, 43885, 122010, 340323, 954394, 2685930, 7588770, 21507696, 61144062, 174283887, 498012094, 1426213191, 4092816966, 11767176070, 33890202192, 97761428205, 282424564744
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| When interspersed with 0's, exponents in expansion of A065481 as a product zeta(n)^(-a(n)).
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LINKS
| Juggling Information Service, Site Swap FAQs
G. Niklasch, Some number theoretical constants: 1000-digit values [Cached copy]
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EXAMPLE
| We have one period 1 (2), two period 2 (31/13 and 40/04) and six period three 2-ball siteswaps (312, 330, 411, 420, 501, 600) (The average of digits is always 2).
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MAPLE
| [seq(DistSS(p, 2), p=1..60)];
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CROSSREFS
| Row 2 of A065177. Cf. A065179, A065180.
Sequence in context: A180666 A121328 A139379 * A178936 A148438 A148439
Adjacent sequences: A065175 A065176 A065177 * A065179 A065180 A065181
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KEYWORD
| nonn
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AUTHOR
| Antti Karttunen Oct 19 2001
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