Pascal's triangle - 1: Triangle read by rows: T(n, k) = A007318(n, k) - 1.

Terms

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