Generalized Catalan numbers C(-9; n).

A064331

Generalized Catalan numbers C(-9; n).

Terms

    a(0) =1a(1) =1a(2) =-8a(3) =145a(4) =-3266a(5) =82342a(6) =-2223818a(7) =62912809a(8) =-1840413050a(9) =55217088622

External references