A245091 Number of (2n+1)-node rooted identity trees of height n.

1, 0, 0, 2, 12, 61, 301, 1460, 7019, 33628, 160934, 770109, 3686706, 17661288, 84675601, 406319271, 1951428049, 9380072046, 45124798445, 217252113080, 1046731684143, 5046754081095, 24348794377704, 117547968556766, 567818803946292, 2744396907325759

Offset: 0

Author

Alois P. Heinz, Jul 11 2014

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..300

Crossrefs

Cf. A227819.

Formula

a(n) = A227819(2n+1,n).

a(n) ~ c * d^n / sqrt(n), where d = 4.9159375028212... (same as for A245090), c = 0.076188269997... . - Vaclav Kotesovec, Jul 12 2014