72001domain: NAppears in sequencesa(n) = 80*n^2 + 1.at n=30A158776Constant term in the reduction by (x^2 -> x+1) of the polynomial C(n)*x^n, where C=A022095.at n=12A192916Number of nX2 0,1 arrays with the row and column sums nondecreasing.at n=14A202554Semiprimes of the form 5*n^2 + 1.at n=34A212707