Triangle of Delannoy paths counted by number of diagonal steps not preceded by an east step.

Terms

a(0) =1a(1) =2a(2) =1a(3) =8a(4) =4a(5) =1a(6) =32a(7) =24a(8) =6a(9) =1a(10) =136a(11) =128a(12) =48a(13) =8a(14) =1a(15) =592a(16) =680a(17) =320a(18) =80a(19) =10a(20) =1a(21) =2624a(22) =3552a(23) =2040a(24) =640a(25) =120a(26) =12a(27) =1a(28) =11776a(29) =18368