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A300481
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Rectangular array read by antidiagonals: a(m,n) = 2 * Integral_{t>=0} T_n((t-m)/2)*exp(-t)*dt, m>=0, n>=0, where T_n(x) is n-th Chebyshev polynomial of first kind.
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7
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2, 2, 1, 2, 0, 0, 2, -1, -1, 3, 2, -2, 0, 2, 18, 2, -3, 3, 1, 7, 95, 2, -4, 8, -6, 2, 34, 592, 2, -5, 15, -25, 15, 13, 218, 4277, 2, -6, 24, -62, 82, -28, 80, 1574, 35010, 2, -7, 35, -123, 263, -269, 106, 579, 12879, 320589
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OFFSET
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0,1
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COMMENTS
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Although negative values of m are not present here or in A300480, the two arrays are connected with the formula: a(m,n) = A300480(-m,n). Thus, they essentially represent two "halves" of the same array indexed by integers m.
a(m,n) is a polynomial in m of degree n.
For any integers m>=0, n>=0, 2 * Integral_{t=-m..m} T_n(t/2)*exp(-t)*dt = 4 * Integral_{z=-m/2..m/2} T_n(z)*exp(-2*z)*dz = a(m,n)*exp(m) - A300480(m,n)*exp(-m).
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LINKS
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FORMULA
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a(m,n) = A300480(-m,n) = Sum_{i=0..n} A127672(n,i) * i! * Sum_{j=0..i} (-m)^j/j!.
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EXAMPLE
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Array starts with:
m=0: 2, 1, 0, 3, 18, 95, 592, ...
m=1: 2, 0, -1, 2, 7, 34, 218, ...
m=2: 2, -1, 0, 1, 2, 13, 80, ...
m=3: 2, -2, 3, -6, 15, -28, 106, ...
m=4: 2, -3, 8, -25, 82, -269, 920, ...
...
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PROG
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CROSSREFS
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Values for m<=0 are given in A300480.
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KEYWORD
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AUTHOR
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STATUS
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approved
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