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Search: id:A102412
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| A102412 |
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Odd triangle !n. This table read by rows gives the coefficients of sum formulae of n-th Left factorials (A003422). The k-th row (6>=k>=1) contains T(i,k) for i=1 to k+1, where k=[2*n+3+(-1)^n]/4 and T(i,k) satisfies !n = Sum_{i=1..k+1} T(i,k) * n^(i-1) / (2*k-2)!. |
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6
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| 0, 1, -4, 4, 0, 96, -396, 108, 0, 1012320, -192900, -64890, 11460, 90, -2038014720, 1977810240, -304486560, -12131280, 2792160, 21840, -33190735737600, 4445760574080, 2334485260800, -394554283200, 2330344800, 1198048320, 8215200
(list; table; graph; listen)
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OFFSET
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1,3
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COMMENT
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Incidently, the sum of signed coefficients for each k-th row is divisible by (2*k-2)!.
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LINKS
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A. F. Labossiere, Sobalian Coefficients.
A. F. Labossiere, Miscellaneous.
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EXAMPLE
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!11=4037914; substituting n=11 in the formula of the k-th row we obtain k=6
and the coefficients T(i,6) are those needed for computing !11.
=> !11 = [ -33190735737600 +4445760574080*11 +2334485260800*11^2 -394554283200*11^3
+2330344800*11^4 +1198048320*11^5 +8215200*11^6 ]/10! = 4037914.
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CROSSREFS
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Cf. A102411, A094638, A094216, A003422, A008276, A101752, A102409, A102410, A101751, A000142, A101559, A101032, A099731.
Sequence in context: A030045 A126089 A111848 this_sequence A048152 A070430 A163353
Adjacent sequences: A102409 A102410 A102411 this_sequence A102413 A102414 A102415
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KEYWORD
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sign,tabl,uned
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AUTHOR
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Andre F. Labossiere (boronali(AT)laposte.net), Jan 07 2005
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