Triangle read by rows. T(n, k) = A081658(n, k) + A363393(n, k) for k > 0 and T(n, 0) = 1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =-1a(6) =1a(7) =3a(8) =-3a(9) =-2a(10) =1a(11) =4a(12) =-6a(13) =-8a(14) =5a(15) =1a(16) =5a(17) =-10a(18) =-20a(19) =25a(20) =16a(21) =1a(22) =6a(23) =-15a(24) =-40a(25) =75a(26) =96a(27) =-61a(28) =1a(29) =7