Poly-Bernoulli numbers B_n^(k) with k=-4.

Terms

a(0) =1a(1) =16a(2) =146a(3) =1066a(4) =6902a(5) =41506a(6) =237686a(7) =1315666a(8) =7107302a(9) =37712866a(10) =197451926a(11) =1023358066a(12) =5262831302a(13) =26903268226a(14) =136887643766a(15) =693968021266