A066221 Bisection of A001189.

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

Offset

0,2

Links

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

Mathematica

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

Crossrefs

Sequence in context: A024217 A199679 A118726 * A370280 A367786 A332468

Adjacent sequences: A066218 A066219 A066220 * A066222 A066223 A066224

Keyword

nonn,easy

Author

N. J. A. Sloane, Dec 19 2001

Extensions

More terms from Sascha Kurz, Mar 24 2002

Status

approved