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 A062266 Row sums of unsigned triangle A062140 (generalized a=4 Laguerre). 5
 1, 6, 43, 358, 3393, 36046, 424051, 5470158, 76751233, 1163391958, 18941512731, 329604456886, 6103575192193, 119823200043678, 2485452283923043, 54309931242376606, 1246803623807490561, 29999359707124127398, 754865494585690965643, 19824604328577866107398 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 FORMULA E.g.f.: exp(x/(1-x))/(1-x)^5. a(n) = Sum_{m=0..n} n!*binomial(n+4, n-m)/m!. a(n) = 2*(n+2)*a(n-1) - (n-1)*(n+3)*a(n-2). - Vaclav Kotesovec, Oct 11 2012 a(n) ~ exp(2*sqrt(n)-n-1/2)*n^(n+9/4)/sqrt(2). - Vaclav Kotesovec, Oct 11 2012 a(n) = n!*LaguerreL(n, 4, -1). - G. C. Greubel, Mar 10 2021 MAPLE A062266:= n -> n!*simplify(LaguerreL(n, 4, -1), 'LaguerreL'); seq(A062266(n), n = 0 .. 30); # G. C. Greubel, Mar 10 2021 MATHEMATICA Table[n!*SeriesCoefficient[E^(x/(1-x))/(1-x)^5, {x, 0, n}], {n, 0, 20}] (* Vaclav Kotesovec, Oct 11 2012 *) PROG (PARI) my(x='x+O('x^66)); Vec(serlaplace(exp(x/(1-x))/(1-x)^5)) \\ Joerg Arndt, May 06 2013 (PARI) a(n) = vecsum(apply(abs, Vec(n!*pollaguerre(n, 4)))); \\ Michel Marcus, Feb 06 2021 (MAGMA) [(&+[Factorial(n)*Binomial(n+4, n-m)/Factorial(m): m in [0..n]]): n in [0..20]]; // G. C. Greubel, Feb 06 2018 (Sage) [factorial(n)*gen_laguerre(n, 4, -1) for n in (0..30)] # G. C. Greubel, Mar 10 2021 CROSSREFS Cf. A062140, A216294. Sequence in context: A220097 A090010 A176732 * A217485 A337555 A290783 Adjacent sequences:  A062263 A062264 A062265 * A062267 A062268 A062269 KEYWORD nonn,easy AUTHOR Wolfdieter Lang, Jun 19 2001 STATUS approved

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Last modified April 16 18:53 EDT 2021. Contains 343050 sequences. (Running on oeis4.)