id:A059489 - OEIS Search Results

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

+0
2

1, 5, 66, 2431, 252586, 74327145, 62062015500, 147198472495020, 992340657705109416, 19023173201224270401428, 1037283901500845276138040124, 160915151663568862349180293275135, 71031251058324655345105192111798148156, 89229337105909072018801794323387547092631236 (list; graph; listen)

	OFFSET	`0,2`
	LINKS	`G. Kuperberg, Symmetry classes of alternating-sign matrices under one roof, arXiv math.CO/0008184 [Th. 5, but the formula is wrong]`
	MAPLE	`A059489 := proc(n) local i, j, t1; t1 := (-3)^(n^2)2^(2n); for i to 2n + 1 do for j to 2n + 1 do if j mod 2 = 0 then t1 := t1(3j - 3i + 2)/(j - i +2n +1) end if end do end do; t1 end proc;`
	CROSSREFS	`Adjacent sequences: A059486 A059487 A059488 this_sequence A059490 A059491 A059492` `Sequence in context: A012635 A012476 A042491 this_sequence A059852 A057171 A142009`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas, Feb 04 2001`

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Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

AT&T Labs Research