Generalized Poly-Bernoulli numbers.

Terms

a(0) =0a(1) =1a(2) =6a(3) =29a(4) =130a(5) =561a(6) =2366a(7) =9829a(8) =40410a(9) =164921a(10) =669526a(11) =2707629a(12) =10919090a(13) =43942081a(14) =176565486a(15) =708653429a(16) =2841788170a(17) =11388676041a(18) =45619274246a(19) =182670807229a(20) =731264359650