A245090 Number of 2n-node rooted identity trees of height n.

0, 1, 1, 2, 8, 34, 149, 672, 3078, 14232, 66278, 310408, 1460390, 6896417, 32668860, 155166468, 738679240, 3523549192, 16837094932, 80580576022, 386187326865, 1853144445292, 8902504243912, 42811658101548, 206072505914938, 992778384676916, 4786621055083592

Offset: 0

Author

Alois P. Heinz, Jul 11 2014

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..125

Crossrefs

Cf. A227819.

Formula

a(n) = A227819(2n,n).

a(n) ~ c * d^n / sqrt(n), where d = 4.9159375028212..., c = 0.025641919495... . - Vaclav Kotesovec, Jul 12 2014