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

0,4

Links

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

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

Crossrefs

Cf. A227819.

Sequence in context: A099795 A358448 A127044 * A037562 A321277 A187001

Adjacent sequences: A245088 A245089 A245090 * A245092 A245093 A245094

Keyword

nonn

Author

Alois P. Heinz, Jul 11 2014

Status

approved