70704domain: NAppears in sequencesa(n) = (sum of first n primes)^2 - sum of squares of first n primes.at n=13A065595a(n) = n*(n^4 + 30*n^3 + 395*n^2 + 2910*n + 11064)/120.at n=18A090391Number of nondecreasing arrays of n 0..n-1 integers with the sum of their 4th powers equal to sum(i^4,i=0..n-1).at n=18A216632