151425domain: NAppears in sequencesa(n) = (n-2)^4 - a(n-1) - a(n-2), with a(1) = a(2) = 0.at n=26A152729p*(p+2)/3 where p and p+4 are primes.at n=29A181093a(n) = n*(3*n - 2)*(9*n^2 - 6*n - 2).at n=9A264892