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%I #8 Mar 30 2012 17:23:03
%S 5,3,21,13,85,53,341,227,1365,909,5461,3637,21845,14563,87381,58253,
%T 349525,233013,1398101,932067,5592405,3728269,22369621,14913077,
%U 89478485,59652323,357913941,238609293,1431655765,954437173,5726623061,3817748707,22906492245
%N Last number in row n of triangle A199636.
%C This sequence appears to satisfy a(n) = 4*a(n-2) + a(n-6) - 4*a(n-8). It also appears that a(2n) = A002450(n).
%K nonn
%O 4,1
%A _T. D. Noe_, Nov 14 2011