40370176

Appears in sequences

• a(n) = 2^n*(binomial(n,2) + 1).at n=18A052481
• a(n) = (4*n - 3) * 2^(n - 1).at n=19A118415
• The hyper-Wiener index of the hypercube graph Q(n) (n>=2).at n=9A228310