login
A131656
Principal number of K. Saito for tree of type E_n.
1
-1, 3, 0, 3, 5, 18, 66, 298, 1511, 8670, 55168, 386394, 2951673, 24428654, 217723390, 2079109386, 21177620171, 229195610430, 2626388037372, 31768201320634, 404485298533085, 5407570127090958, 75736453324821754, 1108952444876609898, 16943545270848408495
OFFSET
0,2
CROSSREFS
Same as A131611 except for leading terms. Cf. A000111, A131281, A034428.
Sequence in context: A229704 A372865 A014715 * A194492 A194136 A194480
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Oct 30 2007
STATUS
approved