A066221 Bisection of A001189.

0, 3, 25, 231, 2619, 35695, 568503, 10349535, 211799311, 4809701439, 119952692895, 3257843882623, 95680443760575, 3020676745975551, 101990226254706559, 3666624057550245375, 139813029266338603263

Offset: 0

Author

N. J. A. Sloane, Dec 19 2001

Keywords

• nonn
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..90

Programs

Mathematica

Table[(-2)^n*HypergeometricU[-n, 3/2, -1/2] - 1, {n, 0, 16}] (* Jean-François Alcover, Apr 09 2014 *)

Extensions

More terms from Sascha Kurz, Mar 24 2002