Triangle T by rows: second differences of Motzkin triangle (A026300), (i >= -1, -1<=j<=i).

Terms

a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =1a(7) =1a(8) =2a(9) =1a(10) =1a(11) =2a(12) =4a(13) =4a(14) =3a(15) =1a(16) =3a(17) =7a(18) =10a(19) =11a(20) =7a(21) =1a(22) =4a(23) =11a(24) =20a(25) =28a(26) =28a(27) =18a(28) =1a(29) =5