Binomial transform of A131666.

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =12a(5) =33a(6) =90a(7) =252a(8) =729a(9) =2160a(10) =6480a(11) =19521a(12) =58806a(13) =176904a(14) =531441a(15) =1595052a(16) =4785156a(17) =14353281a(18) =43053282a(19) =129146724a(20) =387420489a(21) =1162241784a(22) =3486725352a(23) =10460235105a(24) =31380882462a(25) =94143001680a(26) =282429536481a(27) =847289140884