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Search: id:A124048
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| A124048 |
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a(n) = count of instances where the i-th permutation is divisible by i, treating the permutations of {0,1,...n-1} as integers base n in ascending order. |
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+0
1
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| 1, 2, 1, 7, 4, 11, 8, 26, 23, 30, 14, 28
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OFFSET
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1,2
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EXAMPLE
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For n = 5, the first, 2nd, 7th and 18th permutations base 3 {01234,01243,02134,03421} = decimal {194,198,294,486} are divisible by 1,2,7 and 18 respectively. a(5) = 4.
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CROSSREFS
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Cf. A124453.
Adjacent sequences: A124045 A124046 A124047 this_sequence A124049 A124050 A124051
Sequence in context: A107865 A089225 A075085 this_sequence A087059 A120872 A141512
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KEYWORD
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nonn
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AUTHOR
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David J. Scambler (dscambler(AT)bmm.com), Nov 02 2006
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