262016domain: NAppears in sequencesa(n) = 8^(n+1) - 2^(n+2).at n=5A020540Number of subpartitions of partition P=[0,0,0,0,1,1,1,1,1,2,2,2,2,2,2,3,...], where P(n) = [(sqrt(8*n+49) - 7)/2].at n=37A121433Chebyshev polynomial of the second kind U(3,n).at n=32A144138Numbers n such that 8^9 + n^2 is a square.at n=5A180972