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URL: https://oeis.org/A130188

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A130188
Denominators of rationals r(n) related to the z-sequence of the Sheffer matrix A060821 for Hermite polynomials.
2
1, 4, 4, 32, 16, 64, 64, 1024, 256, 1024, 1024, 8192, 4096, 16384, 16384, 524288, 65536, 262144, 262144, 2097152, 1048576, 4194304, 4194304, 67108864, 16777216, 67108864, 67108864, 536870912, 268435456, 1073741824
OFFSET
0,2
COMMENTS
Numerators are A130187.
See A130187 for details on r(n):= A130187(n)/a(n) and the corresponding z-sequence for the Hermite matrix A060821.
LINKS
FORMULA
a(n) = denominator(-2*z(2*n+1)), n>=0, with the e.g.f. for z(n) given in A130187.
MATHEMATICA
F:= CoefficientList[Series[-2*(Exp[x^2/4] -1)/x, {x, 0, 75}], x]*Range[0, 75]!; Table[Denominator[-2*F[[2*n]]], {n, 1, 50}] (* G. C. Greubel, Jul 10 2018 *)
CROSSREFS
Sequence in context: A120030 A138504 A002611 * A270676 A270625 A271019
KEYWORD
nonn,frac,easy
AUTHOR
Wolfdieter Lang, Jun 01 2007
STATUS
approved