44568domain: NAppears in sequencesa(n) = ((n+2)!/2)(1/3 - 1/4 + ... + c/(n+2)), where c = (-1)^(n+1).at n=6A024188Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and 2w^2>x^2+y^2.at n=23A211632Number of compositions (ordered partitions) of n into 2 or more distinct nonnegative parts.at n=24A216708