%I A131656
%S A131656 1,3,0,3,5,18,66,298,1511,8670,55168,386394,2951673,24428654,217723390,
%T A131656 2079109386,21177620171,229195610430,2626388037372,31768201320634,404485298533085,
%U A131656 5407570127090958,75736453324821754,1108952444876609898,16943545270848408495
%V A131656 -1,3,0,3,5,18,66,298,1511,8670,55168,386394,2951673,24428654,217723390,
%W A131656 2079109386,21177620171,229195610430,2626388037372,31768201320634,404485298533085,
%X A131656 5407570127090958,75736453324821754,1108952444876609898,16943545270848408495
%N A131656 Principal number of K. Saito for tree of type E_n.
%D A131656 Y. Sano, The principal numbers of K. Saito for the types A_l, D_l and 
               E_l, Discr. Math., 307 (2007), 2636-2642.
%Y A131656 Same as A131611 except for leading terms. Cf. A000111, A131281, A034428.
%Y A131656 Sequence in context: A127749 A138188 A014715 this_sequence A120987 A011076 
               A010599
%Y A131656 Adjacent sequences: A131653 A131654 A131655 this_sequence A131657 A131658 
               A131659
%K A131656 sign
%O A131656 0,2
%A A131656 N. J. A. Sloane (njas(AT)research.att.com), Oct 30 2007