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Search: id:A125301
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| A125301 |
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a(3n) = n, a(3n+1) = (n+2)*a(3n), a(3n+2) = (n+2)*a(3n+1). |
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+0
1
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| 0, 0, 0, 1, 3, 9, 2, 8, 32, 3, 15, 75, 4, 24, 144, 5, 35, 245, 6, 48, 384, 7, 63, 567, 8, 80, 800, 9, 99, 1089, 10, 120, 1440, 11, 143, 1859, 12, 168, 2352, 13, 195, 2925, 14, 224, 3584, 15, 255, 4335, 16, 288, 5184, 17, 323, 6137, 18, 360, 7200, 19, 399, 8379, 20
(list; graph; listen)
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OFFSET
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0,5
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COMMENT
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From a competency test.
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MAPLE
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a:=proc(n): if n mod 3=0 then n/3 elif n mod 3 = 1 then (n+5)*a(n-1)/3 else (n+4)*a(n-1)/3 fi end: seq(a(n), n=0..75); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 01 2007
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CROSSREFS
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Sequence in context: A094724 A008564 A060956 this_sequence A098323 A016674 A091670
Adjacent sequences: A125298 A125299 A125300 this_sequence A125302 A125303 A125304
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KEYWORD
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nonn
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AUTHOR
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Trent Stratton (trent.stratton(AT)gov.bc.ca), Dec 08 2006
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EXTENSIONS
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Solution from njas, Dec 08 2006
More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Jan 01 2007
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