Triangle of 3-Narayana numbers, N(n,k), for n >= 1, 0 <= k <= 2n-2.

Terms

a(0) =1a(1) =1a(2) =3a(3) =1a(4) =1a(5) =10a(6) =20a(7) =10a(8) =1a(9) =1a(10) =22a(11) =113a(12) =190a(13) =113a(14) =22a(15) =1a(16) =1a(17) =40a(18) =400a(19) =1456a(20) =2212a(21) =1456a(22) =400a(23) =40a(24) =1a(25) =1a(26) =65a(27) =1095a(28) =7095a(29) =20760