T(n,k) = 4*A046802(n,k) - 3*A007318(n,k), triangle read by rows (0 <= k <= n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =6a(5) =1a(6) =1a(7) =19a(8) =19a(9) =1a(10) =1a(11) =48a(12) =114a(13) =48a(14) =1a(15) =1a(16) =109a(17) =494a(18) =494a(19) =109a(20) =1a(21) =1a(22) =234a(23) =1847a(24) =3472a(25) =1847a(26) =234a(27) =1a(28) =1a(29) =487