A059488 - OEIS

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A059488

Expansion of generating function A_{UU}^(2)(4n;2,1,1).

1, 6, 140, 12936, 4756752, 6974908512, 40825196325056, 954410297723625600, 89149543741372647686400, 33280303224443643993143232000, 49660896290963321355372907102080000, 296248087478941460167300263349693113600000, 7065635944743752671502919147104799866118720000000 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..12.` `G. Kuperberg, Symmetry classes of alternating-sign matrices under one roof, arXiv math.CO/0008184 [Th. 5]`
	MAPLE	`A059488 := proc(n) local i, j, t1; t1 := 2^(n^2 + 2n); for i to 2n + 1 do for j to 2n + 1 do if i mod 2 <> 0 and j mod 2 = 0 then t1 := t1(2j - 2i + 1)/(2j - 2i) end if end do end do; t1 end proc;`
	CROSSREFS	`Sequence in context: A012818 A078450 A193502 * A067196 A048863 A111839` `Adjacent sequences: A059485 A059486 A059487 * A059489 A059490 A059491`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane, Feb 04 2001`
	STATUS	`approved`

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Last modified May 24 22:42 EDT 2013. Contains 225631 sequences.