Column of Motzkin triangle.

Terms

a(0) =1a(1) =4a(2) =14a(3) =44a(4) =133a(5) =392a(6) =1140a(7) =3288a(8) =9438a(9) =27016a(10) =77220a(11) =220584a(12) =630084a(13) =1800384a(14) =5147328a(15) =14727168a(16) =42171849a(17) =120870324a(18) =346757334a(19) =995742748a(20) =2862099185a(21) =8234447672a(22) =23713180780a(23) =68350541480a(24) =197188167735a(25) =569371325796