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A331433
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Column 1 of triangle in A331431.
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3
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6, -24, 60, -120, 210, -336, 504, -720, 990, -1320, 1716, -2184, 2730, -3360, 4080, -4896, 5814, -6840, 7980, -9240, 10626, -12144, 13800, -15600, 17550, -19656, 21924, -24360, 26970, -29760, 32736, -35904, 39270, -42840, 46620, -50616, 54834, -59280, 63960, -68880, 74046
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OFFSET
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0,1
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COMMENTS
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LINKS
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FORMULA
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E.g.f.: (6 - 18*x + 9*x^2 - x^3)*exp(-x). - G. C. Greubel, Mar 22 2022
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MATHEMATICA
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CoefficientList[Series[6/(1+x)^4, {x, 0, 40}], x] (* Georg Fischer, Jan 18 2020 *)
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PROG
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(Magma) [6*(-1)^n*Binomial(n+3, 3): n in [0..50]]; // G. C. Greubel, Mar 22 2022
(Sage) [6*(-1)^n*binomial(n+3, 3) for n in (0..50)] # G. C. Greubel, Mar 22 2022
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CROSSREFS
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Cf. A098737 (unsigned, 2nd subdiagonal).
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KEYWORD
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sign,easy
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AUTHOR
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EXTENSIONS
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a(4) changed to 210, and more terms from Georg Fischer, Jan 18 2020
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STATUS
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approved
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