86065domain: NAppears in sequencesa(n) = 2nd elementary symmetric function of the first n+1 positive integers congruent to 1 mod 4.at n=13A024378Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of B(x)^k, where B(x) is the g.f. of A384942.at n=63A384945