-117440512domain: ZAppears in sequencesa(n) = 8^n - n^9.at n=8A024097Alternated reading of A000302 and negated A002042.at n=25A140721a(n) = 2^n*floor((5-2*n)/3).at n=23A171552Determinant of the matrix a(i,j) = 1 if abs(i-j) < 2 and -1 in the rest.at n=22A174647Expansion of Product_{k>0} (1 - 2^(k-1)*x^k).at n=30A337299