Triangle read by rows which contains the (6n)-th row of the Pascal triangle in row n.

Terms

a(0) =1a(1) =1a(2) =6a(3) =15a(4) =20a(5) =15a(6) =6a(7) =1a(8) =1a(9) =12a(10) =66a(11) =220a(12) =495a(13) =792a(14) =924a(15) =792a(16) =495a(17) =220a(18) =66a(19) =12a(20) =1a(21) =1a(22) =18a(23) =153a(24) =816a(25) =3060a(26) =8568a(27) =18564a(28) =31824a(29) =43758