Triangle read by rows: denominators of Cotesian numbers C(n,k) (0 <= k <= n).

Terms

a(0) =1a(1) =2a(2) =2a(3) =6a(4) =3a(5) =6a(6) =8a(7) =8a(8) =8a(9) =8a(10) =90a(11) =45a(12) =15a(13) =45a(14) =90a(15) =288a(16) =96a(17) =144a(18) =144a(19) =96a(20) =288a(21) =840a(22) =35a(23) =280a(24) =105a(25) =280a(26) =35a(27) =840a(28) =17280a(29) =17280