Second column of inverse of Delannoy triangle.

Terms

a(0) =0a(1) =1a(2) =-3a(3) =10a(4) =-38a(5) =158a(6) =-698a(7) =3218a(8) =-15310a(9) =74614a(10) =-370610a(11) =1869338a(12) =-9549174a(13) =49302030a(14) =-256859754a(15) =1348695330a(16) =-7129819038a(17) =37916710374a(18) =-202708895330