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Search: id:A117826
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| A117826 |
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First four terms of the sequence are doubled, then those numbers are tripled and then those numbers are quadrupled, etc. |
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+0
1
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| 1, 2, 3, 4, 2, 4, 6, 8, 6, 12, 18, 24, 24, 48, 72, 96, 120, 240, 360, 480, 720, 1440, 2160, 2880, 5040, 10080, 15120, 20160, 40320, 80640, 120960, 161280, 362880, 725760, 1088640, 1451520, 3628800, 7257600, 10886400, 14515200, 39916800, 79833600
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(4n-3) = A000142(n). a(4n-2)=2*A000142(n)=A052849(n), a(4n-1)=3*A000142(n)=A052560(n), a(4n)=4*A000142(n)=2*A052849(n)=A052578(n).
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MATHEMATICA
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Table[n!{1, 2, 3, 4}, {n, 11}] // Flatten
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CROSSREFS
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Cf. A000142, A115425.
Adjacent sequences: A117823 A117824 A117825 this_sequence A117827 A117828 A117829
Sequence in context: A023632 A107572 A043264 this_sequence A075994 A100798 A121701
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 25 2006
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