A038000 Number of forests of rooted trees where n dollars are spent and an n-node tree costs 2n-1 dollars.

1, 1, 2, 2, 4, 5, 9, 11, 21, 28, 50, 68, 123, 173, 310, 441, 789, 1147, 2044, 2999, 5351, 7938, 14143, 21138, 37686, 56729, 101144, 153085, 273077, 415407, 741301, 1132373, 2021831, 3100128, 5537782, 8519076, 15225373