Triangular array read by rows: A063007 * A007318.

Terms

a(0) =1a(1) =3a(2) =2a(3) =13a(4) =18a(5) =6a(6) =63a(7) =132a(8) =90a(9) =20a(10) =321a(11) =900a(12) =930a(13) =420a(14) =70a(15) =1683a(16) =5910a(17) =8190a(18) =5600a(19) =1890a(20) =252a(21) =8989a(22) =37926a(23) =65940a(24) =60480a(25) =30870a(26) =8316a(27) =924a(28) =48639a(29) =239624