2828101

Appears in sequences

• a(n) = hypergeom([-n, n - 1/2], [1], -4).at n=6A299506
• Rectangular array A(n, k) = hypergeom([-k, k + n/2 - 1], [1], -4) with row n >= 0 and k >= 0, read by ascending antidiagonals.at n=34A300945