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Search: id:A061121
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| A061121 |
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Number of degree-n permutations of order exactly 6. |
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+0
23
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| 0, 0, 0, 0, 20, 240, 1470, 10640, 83160, 584640, 4496030, 42658440, 371762820, 3594871280, 38650622010, 396457108320, 4330689250160, 53963701424640, 641211774798510, 8205894865096280, 113786291585124060
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OFFSET
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1,5
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FORMULA
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E.g.f.: exp(x)-exp(x+1/2*x^2)-exp(x+1/3*x^3)+exp(x+1/2*x^2+1/3*x^3+1/6*x^6).
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CROSSREFS
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Cf. A000085, A001470, A001472, A052501, A053496-A053505, A001189, A001471, A001473, A061121-A061128.
Sequence in context: A074334 A163004 A061139 this_sequence A073398 A040075 A138442
Adjacent sequences: A061118 A061119 A061120 this_sequence A061122 A061123 A061124
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KEYWORD
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easy,nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 14 2001
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