A001698 a(n) = ceiling(sqrt( 2*Pi )^n).

1, 3, 7, 16, 40, 99, 249, 622, 1559, 3907, 9793, 24547, 61529, 154231, 386598, 969057, 2429064, 6088761, 15262259, 38256810, 95895601, 240374624, 602529829, 1510318306, 3785806568, 9489609785, 23786924201, 59624976769, 149457652642, 374634777973

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn

Links

• T. D. Noe, Table of n, a(n) for n = 0..500

Programs

Mathematica

Table[Ceiling[Sqrt[2Pi]^n], {n, 0, 50}] (* Stefan Steinerberger, Apr 14 2006 *)