A059488 -id:A059488 - cp's OEIS frontend

A059493 A005156(n)*A059488(n)^2.

1, 36, 58800, 4350842496, 14616841474819584, 2232275367429083934397440, 15508029030753757178368051489382400, 4903022043055128535359103830176804216217600000, 70564996915837622037116996413540007182305594153356328960000

Offset: 0

N. J. A. Sloane, Feb 04 2001

G. Kuperberg, Symmetry classes of alternating-sign matrices under one roof, arXiv math.CO/0008184 [A_{UU}(4n)]

Cf. A005156, A059488, A107445.

Definition changed by N. J. A. Sloane following a comment by Paul Zinn-Justin (pzinn(AT)lptms.u-psud.fr), May 29 2007

A107445 Number of 4n X 4n alternating-sign matrices of type UU.

Original entry on oeis.org

1, 5, 198, 63206, 163170556, 3410501048325, 577465332522075000, 792313244775191409073200, 8810729389390415079342840510816

Offset: 0

Paul Zinn-Justin, May 16 2007, Jun 04 2007

G. Kuperberg, Symmetry classes of alternating-sign matrices under one roof, arXiv:math/0008184 [math.CO], 2000-2001. [A_{UU}(4n)]

Cf. A005156, A059488, A059493.

a(n) = A005156(n)*A059489(n).

cp's OEIS Frontend

A059493 A005156(n)*A059488(n)^2.

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