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Number of n-node rooted identity trees with thinning limbs and root outdegree (branching factor) 10.
2

%I #8 Jul 12 2014 10:10:51

%S 4,38,176,709,2461,7877,23564,67260,184289,489321,1264330,3194192,

%T 7913035,19276841,46269287,109625994,256748635,595150930,1366840825,

%U 3112999517,7036328521,15794921314,35233087579,78140317345,172382151706,378427107050,826999312010

%N Number of n-node rooted identity trees with thinning limbs and root outdegree (branching factor) 10.

%H Alois P. Heinz, <a href="/A245129/b245129.txt">Table of n, a(n) for n = 43..500</a>

%p b:= proc(n, i, h, v) option remember; `if`(n=0, `if`(v=0, 1, 0),

%p `if`(i<1 or v<1 or n<v, 0, add(binomial(A(i, min(i-1, h)), j)

%p *b(n-i*j, i-1, h, v-j), j=0..min(n/i, v))))

%p end:

%p A:= proc(n, k) option remember;

%p `if`(n<2, n, add(b(n-1$2, j$2), j=1..min(k, n-1)))

%p end:

%p a:= n-> b(n-1$2, 10$2):

%p seq(a(n), n=43..75);

%Y Column k=10 of A245120.

%K nonn

%O 43,1

%A _Alois P. Heinz_, Jul 12 2014