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URL: https://oeis.org/A245091

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A245091
Number of (2n+1)-node rooted identity trees of height n.
2
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
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 A377464
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 11 2014
STATUS
approved