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 A162447 Denominators of the column sums of the ZG1 matrix 1
 12, 720, 181440, 7257600, 399168000, 1307674368000, 73229764608000, 731699852083200, 229909239772692480000, 84300054583320576000000, 51186993142992253747200000, 21777738900836704321536000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 COMMENTS For the definition of the ZG1 matrix coefficients see A162446. We define the columns sums by cs(n) = sum(ZG1[2*m-1,n], m = 1.. infinity) for n => 2. LINKS Table of n, a(n) for n=2..13. FORMULA a(n) = denom(cs(n)) and numer(cs(n)) = A162446(n). CROSSREFS See A162446 for the numerators of the column sums. Sequence in context: A000909 A375105 A358732 * A061025 A042749 A219568 Adjacent sequences: A162444 A162445 A162446 * A162448 A162449 A162450 KEYWORD easy,frac,nonn AUTHOR Johannes W. Meijer, Jul 06 2009 STATUS approved

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Last modified September 12 22:20 EDT 2024. Contains 375855 sequences. (Running on oeis4.)