OFFSET
0,4
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..100
A. Knutson and P. Zinn-Justin, A scheme related to the Brauer loop model, Adv. in Math. 214 (2007), 40-77.
FORMULA
a(2n) = det(binomial(2i+2j+1,2i)), 0<=i,j<=n-1; a(2n+1) = det(binomial(2i+2j+3,2i+1)), 0<=i,j<=n-1.
MATHEMATICA
a[n_] := Which[n == 0, 1, n == 1, 1, EvenQ[n], Det[Table[Binomial[2i + 2j + 1, 2i], {i, 0, n/2 - 1}, {j, 0, n/2 - 1}]], True, Det[Table[Binomial[2i + 2j + 3, 2i + 1], {i, 0, (n-1)/2 - 1}, {j, 0, (n-1)/2 - 1}]]];
Table[a[n], {n, 0, 19}] (* Jean-François Alcover, Dec 14 2018 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul Zinn-Justin, Aug 06 2007
EXTENSIONS
More terms from Alois P. Heinz, Dec 04 2018
STATUS
approved