761121

Appears in sequences

• a(n) = (-1)^n*hypergeom([-n, n], [1], 4).at n=6A299507
• Rectangular array A(n, k) = (-1)^k*hypergeom([-k, k + n/2 - 1/2], [1], 4) with row n >= 0 and k >= 0, read by ascending antidiagonals.at n=34A300946