Triangle T(n, k) = 4 * A008292(n+1, k) - 3, read by rows.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =13a(5) =1a(6) =1a(7) =41a(8) =41a(9) =1a(10) =1a(11) =101a(12) =261a(13) =101a(14) =1a(15) =1a(16) =225a(17) =1205a(18) =1205a(19) =225a(20) =1a(21) =1a(22) =477a(23) =4761a(24) =9661a(25) =4761a(26) =477a(27) =1a(28) =1a(29) =985