%N Indices of prime numbers of trees with n unlabeled nodes.
%F A000055(a(n)) = A119641(n). - _Amiram Eldar_, Apr 22 2018
%Y Cf. A000055, A119641.
%A _Jorge Coveiro_, Jul 27 2006
%E Offset changed by _Michel Marcus_, Apr 22 2018
%E a(13)-a(16) from _Amiram Eldar_, Apr 22 2018