Triangle read by rows: number of extensional acyclic digraphs on n labeled nodes with k sources.

A182162

Triangle read by rows: number of extensional acyclic digraphs on n labeled nodes with k sources.

Terms

    a(0) =1a(1) =2a(2) =12a(3) =192a(4) =24a(5) =8160a(6) =2400a(7) =898560a(8) =384480a(9) =14400a(10) =245145600a(11) =126040320a(12) =9777600a(13) =50400a(14) =159035627520a(15) =90043269120a(16) =9660672000a(17) =179222400a(18) =80640a(22) =547498828800a(23) =2586608640

External references