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 A004141 Norm of a matrix. (Formerly M1876) 2
 1, 2, 8, 48, 256, 1280, 6912, 39424, 212992, 1118208, 6553600, 36765696, 199229440, 1133117440, 6499598336, 36175872000, 200655503360, 1167945891840, 6620826304512, 36681168191488, 212364657950720, 1219998345330688, 6864598984556544, 38958828003262464, 226089827240509440, 1287455960675123200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Maximum in the row n-1 of the absolute values of the triangle A127674. - R. J. Mathar, Jul 15 2015 REFERENCES N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS D. W. Kammler and R. J. McGlinn, Local conditioning of parametric forms used to approximate continuous functions, Amer. Math. Monthly, 86 (1979), 841-845. D. W. Kammler and R. J. McGlinn, Local conditioning of parametric forms used to approximate continuous functions, Amer. Math. Monthly, 86 (1979), 841-845. [Annotated scan of page 843 only] FORMULA The scanned page from Kammler and McGlinn (page 843 of the article) gives a fairly explicit way to calculate a(n). - N. J. A. Sloane, Jul 09 2015 MAPLE A := proc(n, k)     2*n/(n+k)*binomial(n+k, n-k)*2^(2*k-1) ; end proc: A004141 := proc(n)     seq(abs(A(n, k)), k=0..n-1) ;     max(%) ; end proc: seq(A004141(n), n=1..30) ; # R. J. Mathar, Jul 15 2015 CROSSREFS Cf. A259868. Sequence in context: A228288 A292277 A173841 * A009693 A192251 A104190 Adjacent sequences:  A004138 A004139 A004140 * A004142 A004143 A004144 KEYWORD nonn AUTHOR STATUS approved

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Last modified January 23 03:08 EST 2019. Contains 319370 sequences. (Running on oeis4.)