Central coefficients of triangle A182013.

Terms

a(0) =1a(1) =3a(2) =15a(3) =85a(4) =531a(5) =3545a(6) =24833a(7) =180251a(8) =1344163a(9) =10237001a(10) =79287469a(11) =622596063a(12) =4945078477a(13) =39658283943a(14) =320689293119