110937domain: NAppears in sequencesa(n) = (2n-1)!! * Sum_{k=0..n-1}(-1)^k/(2k+1).at n=7A024199The ED4 array read by antidiagonals.at n=21A167584A triangle related to the GF(z) formulas of the rows of the ED4 array A167584.at n=27A167594