809068942341domain: NAppears in sequencesa(n) = ((2n-1)!!)^4 * Sum_{i=1..n} 1/(2*i-1)^4.at n=5A291586Square array T(n,k), n>=0, k>=0, read by antidiagonals: T(n,k) = ((2n-1)!!)^k * Sum_{i=1..n} 1/(2*i-1)^k.at n=50A291656