Denominators of the z-sequence for the Sheffer matrix S2*P = A048993*A007318 = A049020.

Terms

a(0) =1a(1) =1a(2) =3a(3) =4a(4) =30a(5) =12a(6) =84a(7) =4a(8) =15a(9) =10a(10) =22a(11) =3a(12) =455a(13) =105a(14) =1a(15) =48a(16) =510a(17) =36a(18) =2660a(19) =168a(20) =660a(21) =1320a(22) =184a(23) =720a(24) =27300a(25) =6552a(26) =216a(27) =16a(28) =3480a(29) =240