Generalized Bell numbers.

Terms

a(0) =1a(1) =0a(2) =0a(3) =1a(4) =1a(5) =1a(6) =201a(7) =1226a(8) =5587a(9) =493333a(10) =8910253a(11) =109739620a(12) =6832444928a(13) =251336859489