38379domain: NAppears in sequencesa(n) = (2*n^3 + 5*n^2 - 17*n)/2.at n=32A162259Least number having n orderless representations as p^2 + q^2 + r^2, where p, q, and r are primes.at n=19A214512Number of (n+1) X 2 0..2 matrices with each 2 X 2 subblock idempotent.at n=16A224669