A246619 Number of solid standard Young tableaux of shape [[4*n,n],[n]].

1, 20, 1876, 229680, 31497284, 4600393936, 699440711760, 109341854545792, 17445620031680100, 2827280025640259280, 463882742476664594512, 76875122571167921990080, 12845419277094419018993808, 2161338658294952555703260480, 365816910931667192749720139072

Offset

0,2

Links

Vaclav Kotesovec, Table of n, a(n) for n = 0..200

S. B. Ekhad, D. Zeilberger, Computational and Theoretical Challenges on Counting Solid Standard Young Tableaux, arXiv:1202.6229v1 [math.CO], 2012

Wikipedia, Young tableau

Formula

a(n) ~ sqrt(4*sqrt(3)-6) * 3^(6*n+1) / (Pi * n * 2^(2*n+3)). - Vaclav Kotesovec, Aug 31 2014

Crossrefs

Cf. column k=4 of A176129.

Cf. A214801, A215686.

Sequence in context: A014606 A330196 A172556 * A222973 A267575 A072818

Adjacent sequences: A246616 A246617 A246618 * A246620 A246621 A246622

Keyword

nonn

Author

Vaclav Kotesovec, Aug 31 2014

Status

approved