%I A129205
%S A129205 1,5,0,2295,453871,0,545539395584,4883188189089105,0,
%T A129205 14214363393075742724609375,5968603205606800870499639536231,0,
%U A129205 41302584753289717847206700750464023881130441
%N A129205 From Wendt's determinant compute (A048954(2*n)/(1-4^n))^(1/2).
%D A129205 P. Ribenboim, 13 Lectures on Fermat's last theorem, Springer-Verlag, 
               NY, 1979, page 62. MR0551363 (81f:10023)
%F A129205 a(n)=0 if and only if n is divisible by 3.
%o A129205 (PARI) {a(n)= if(n<1, 0, n*=2; sqrtint( matdet( matrix( n, n, i, j, binomial( 
               n, (j-i)%n )))/ (1-2^n)))}
%Y A129205 Sequence in context: A164940 A027641 A164555 this_sequence A098173 A058177 
               A079508
%Y A129205 Adjacent sequences: A129202 A129203 A129204 this_sequence A129206 A129207 
               A129208
%K A129205 nonn
%O A129205 1,2
%A A129205 Michael Somos, Apr 03 2007