Triangle read by rows: A001263 * A127648 as infinite lower triangular matrices.

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =6a(5) =3a(6) =1a(7) =12a(8) =18a(9) =4a(10) =1a(11) =20a(12) =60a(13) =40a(14) =5a(15) =1a(16) =30a(17) =150a(18) =200a(19) =75a(20) =6a(21) =1a(22) =42a(23) =315a(24) =700a(25) =525a(26) =126a(27) =7a(28) =1a(29) =56