105091domain: NAppears in sequencesNumber of sum of squares representations of n^2 in n dimensions disregarding order and sign.at n=21A105152Array read by upwards antidiagonals: A(n, k) = index of prime(k)^n in A098550.at n=39A253609Numbers k such that 407*2^k+1 is prime.at n=27A323103