A006771 Exponential self-convolution of numbers of trees on n nodes.

1, 2, 4, 8, 18, 46, 128, 372, 1174, 3820, 13170, 46714, 172490, 652758, 2547196, 10156810, 41495158, 172810254, 734132414, 3171713642, 13933910250, 62121022408, 280907384318, 1286617710114, 5964793344934, 27961159869700, 132441462312280, 633354027835730

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Crossrefs

Cf. A000055.

Sequence in context: A338729 A308030 A252653 * A113989 A126757 A369386

Adjacent sequences: A006768 A006769 A006770 * A006772 A006773 A006774

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved