%I #12 Apr 09 2014 09:36:11
%S 0,3,25,231,2619,35695,568503,10349535,211799311,4809701439,
%T 119952692895,3257843882623,95680443760575,3020676745975551,
%U 101990226254706559,3666624057550245375,139813029266338603263
%N Bisection of A001189.
%H Vincenzo Librandi, <a href="/A066221/b066221.txt">Table of n, a(n) for n = 0..90</a>
%t Table[(-2)^n*HypergeometricU[-n, 3/2, -1/2] - 1, {n, 0, 16}] (* _Jean-François Alcover_, Apr 09 2014 *)
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_, Dec 19 2001
%E More terms from _Sascha Kurz_, Mar 24 2002
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