Second column of triangular array in A079513.

Terms

a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =53a(6) =211a(7) =554a(8) =2306a(9) =6362a(10) =27230a(11) =77580a(12) =338444a(13) =986253a(14) =4362627a(15) =12927170a(16) =57788170a(17) =173452334a(18) =781825066a(19) =2370742868a(20) =10757497972a(21) =32892031042a(22) =150073096238a(23) =462030186916