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Search: id:A082236
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| A082236 |
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a(1) = 1, and then numbers such that the product of n terms starting with the n-th term is an n-th power. The smallest numbers not occurring earlier are used first. |
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+0
2
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| 1, 2, 8, 3, 9, 4, 12, 5, 360000, 6, 90, 7, 28235760, 10, 504, 11, 450153650100, 13, 17637403357173600000, 14, 25740, 15, 360360, 16, 215255040, 17, 33593154183197105261619254400, 18, 16278356694600, 19
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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as a(3) = 8 choose a(4) = 3 ( smallest number not occurring earlier) and a(5) = 9 to satisfy the requirement. The product of three terms starting with a(3) is 8*3*9 = 216 = 6^3.
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CROSSREFS
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Cf. A082237.
Sequence in context: A111445 A076696 A011057 this_sequence A083003 A126951 A076588
Adjacent sequences: A082233 A082234 A082235 this_sequence A082237 A082238 A082239
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Apr 10 2003
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EXTENSIONS
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Corrected and extended by David Wasserman (wasserma(AT)spawar.navy.mil), Aug 26 2004
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