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A131440
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Triangular table of numerators of the coefficients of Laguerre-Sonin polynomials L(1/2,n,x).
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2
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1, 3, -1, 15, -5, 1, 35, -35, 7, -1, 315, -105, 63, -3, 1, 693, -1155, 231, -33, 11, -1, 3003, -3003, 3003, -143, 143, -13, 1, 6435, -15015, 9009, -2145, 715, -13, 1, -1, 109395, -36465, 51051, -7293, 12155, -221, 17, -17, 1, 230945, -692835, 138567, -46189, 46189, -4199, 323, -323, 19, -1
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OFFSET
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0,2
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COMMENTS
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The corresponding denominator table is given in A130562.
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LINKS
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M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].
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FORMULA
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a(n,m) = numerator(L(1/2,n,m)) with L(1/2,n,m) = ((-1)^m)*binomial(n+1/2, n-m)/m!, n>=m>=0, else 0 (taken in lowest terms).
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EXAMPLE
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Triangle begins:
[1];
[3,-1];
[15,-5,1];
[35,-35,7,-1];
[315,-105,63,-3,1];
[693,-1155,231,-33,11,-1];
...
Rationals:
[1];
[3/2, -1];
[15/8, -5/2, 1/2];
[35/16, -35/8, 7/4, -1/6];
...
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MATHEMATICA
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T[n_, k_]:= (-1)^k*Binomial[n+1/2, n-k]/k!; Table[Numerator[T[n, k]], {n, 0, 20}, {k, 0, n}]//Flatten (* G. C. Greubel, May 14 2018 *)
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PROG
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(Python)
from sympy import binomial, factorial, Integer
def a(n, m): return ((-1)**m * binomial(n + 1/Integer(2), n -m) / factorial(m)).numerator()
for n in range(21): print([a(n, m) for m in range(n + 1)]) # Indranil Ghosh, Jun 29 2017
(PARI) for(n=0, 10, for(k=0, n, print1(numerator((-1)^k*binomial(n+1/2, n-k)/k!), ", "))) \\ G. C. Greubel, May 14 2018
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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