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Search: id:A054631
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| A054631 |
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Triangle read by rows: row n (n>=1) contains the numbers T(n,k) = sum_{d|n} phi(d)*k^(n/d)/n, for k=1..n. |
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+0
6
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| 1, 1, 3, 1, 4, 11, 1, 6, 24, 70, 1, 8, 51, 208, 629, 1, 14, 130, 700, 2635, 7826, 1, 20, 315, 2344, 11165, 39996, 117655, 1, 36, 834, 8230, 48915, 210126, 720916, 2097684, 1, 60, 2195, 29144, 217045, 1119796, 4483815, 14913200, 43046889
(list; table; graph; listen)
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OFFSET
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1,3
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LINKS
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Index entries for sequences related to necklaces
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EXAMPLE
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1; 1,3; 1,4,11; 1,6,24,70; 1,8,51,208,629;...
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CROSSREFS
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Cf. A054630, A054618, A054619. Lower triangle of A075195.
Sequence in context: A081720 A137405 A121922 this_sequence A125077 A065253 A010756
Adjacent sequences: A054628 A054629 A054630 this_sequence A054632 A054633 A054634
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KEYWORD
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nonn,tabl
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AUTHOR
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njas, Apr 16 2000, revised Mar 21 2007
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