551300domain: NAppears in sequences1/6 of product of three numbers: n-th prime, previous and following number.at n=34A127920a(n) = floor(n^(3/2))*floor(1 + n^(3/2))*floor(2 + n^(3/2))/6.at n=27A185592a(n) = (5*n + 3)*(5*n + 4)*(5*n + 5)/6.at n=29A300522