Triangle read by rows: T(n,k) = number of sets of linear n-ads in k variables.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =1a(12) =6a(13) =1a(14) =1a(15) =1a(16) =1a(17) =22a(18) =22a(19) =1a(20) =1a(21) =1a(22) =1a(23) =130a(24) =550a(25) =130a(26) =1a(27) =1a(28) =1a(29) =1