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 A316458 Expansion of 60*x*(1 + 4*x + x^2) / (1 - x)^5. 4
 60, 540, 2160, 6000, 13500, 26460, 47040, 77760, 121500, 181500, 261360, 365040, 496860, 661500, 864000, 1109760, 1404540, 1754460, 2166000, 2646000, 3201660, 3840540, 4570560, 5400000, 6337500, 7392060, 8573040, 9890160, 11353500, 12973500, 14760960 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Seems to be the negative of the second column of A316349. LINKS Colin Barker, Table of n, a(n) for n = 1..1000 Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1). FORMULA G.f.: 60*x*(1 + 4*x + x^2) / (1 - x)^5. a(n) = 60 * A000537(n). a(n) = 15*n^4 + 30*n^3 + 15*n^2. a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5) for n>5. PROG (PARI) Vec(60*x*(1 + 4*x + x^2) / (1 - x)^5 + O(x^40)) (PARI) a(n) = 15*n^4 + 30*n^3 + 15*n^2 CROSSREFS Cf. A000537, A316349, A316457, A316459. Sequence in context: A069140 A229376 A298684 * A184191 A101384 A229750 Adjacent sequences:  A316455 A316456 A316457 * A316459 A316460 A316461 KEYWORD nonn,easy AUTHOR Colin Barker, Aug 12 2018 STATUS approved

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Last modified August 6 19:52 EDT 2020. Contains 336256 sequences. (Running on oeis4.)