A197975 Round((2*n+1/n)^n).

3, 20, 254, 4633, 110408, 3243618, 113177496, 4570858599, 209655304353, 10763674952098, 611433842280388, 38071427445729200, 2578294348444597267, 188670154792420320214, 14834716200104606205407, 1247263229999781126495328, 111661618863544248806155259

Offset: 1

Author

Vincenzo Librandi, Oct 20 2011

Keywords

• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..300

Crossrefs

Cf. A014056

Programs

Magma

[Round((2*n+1/n)^n): n in [1..20]]

Mathematica

Table[Round[(2n+1/n)^n],{n,20}] (* Harvey P. Dale, May 28 2018 *)

Extensions

Corrected and extended by Harvey P. Dale, May 28 2018