T(n+2,2) from table A045912 of characteristic polynomial of negative Pascal matrix.

A006135

T(n+2,2) from table A045912 of characteristic polynomial of negative Pascal matrix.

Terms

    a(0) =1a(1) =9a(2) =72a(3) =626a(4) =6084a(5) =64974a(6) =744193a(7) =8965323a(8) =112088583a(9) =1441465015a(10) =18952951005a(11) =253712542005

External references