Lah numbers: Difference between revisions
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m (added another related task.) |
Thundergnat (talk | contribs) m (Add missing parenthesis) |
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L(n, n) = 1 |
L(n, n) = 1 |
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L(n, 1) = n! |
L(n, 1) = n! |
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L(n, k) = ( n! *(n - 1)!) / k! * (k - 1)! ) / (n - k)! # For unsigned Lah numbers |
L(n, k) = ( n! *(n - 1)!) / ( k! * (k - 1)! ) / (n - k)! # For unsigned Lah numbers |
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''or'' |
''or'' |
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L(n, k) = (-1)**n * ( n! *(n - 1)!) / k! * (k - 1)! ) / (n - k)! # For signed Lah numbers |
L(n, k) = (-1)**n * ( n! *(n - 1)!) / ( k! * (k - 1)! ) / (n - k)! # For signed Lah numbers |
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