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A124890
G.f.: A(x) = (1/x)*series_reversion(x^2/G124344(x)), where G124344(x) is the g.f. of A124344 and satisfies: A(x)^2 = (1/x)*G124344(x*A(x)).
3
1, 1, 3, 11, 47, 216, 1047, 5263, 27191, 143484, 770047, 4190031, 23062044, 128170182, 718257014, 4054089110, 23026890216, 131517480529, 754865316100, 4351785130675, 25187530716367, 146305151254984, 852604651815745
OFFSET
0,3
COMMENTS
A124344(n) is the number of ordered rooted trees on n nodes with thinning limbs.
FORMULA
a(n) = A124889(n)/(n+1). a(n) = A124328(2n+1,n+1)/(n+1).
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Nov 12 2006
STATUS
approved