4-Stirling numbers of the second kind.

Terms

a(0) =1a(1) =4a(2) =1a(3) =16a(4) =9a(5) =1a(6) =64a(7) =61a(8) =15a(9) =1a(10) =256a(11) =369a(12) =151a(13) =22a(14) =1a(15) =1024a(16) =2101a(17) =1275a(18) =305a(19) =30a(20) =1a(21) =4096a(22) =11529a(23) =9751a(24) =3410a(25) =545a(26) =39a(27) =1a(28) =16384a(29) =61741