A049147 Revert transform of (1 - x - 4x^2 + x^3)/(1 - 6x^2).

1, 1, 0, 0, 2, 2, 4, 27, 78, 222, 816, 2736, 8784, 29704, 100408, 334889, 1128036, 3819368, 12912484, 43771606, 148863396, 506943540, 1729339848, 5911769970, 20242876176, 69422168880, 238465602096, 820352668488, 2826032713656