%I #10 Oct 31 2014 21:37:57

%S 0,-42,6804,6524,70098,41090,47110,26054,349440,187124,106876,154336,

%T 89600,184296,100660,77084,47894,1192590,644546,358330,453250,287294,

%U 269262,170506,434322,254506,187250,126560,520982,294546,169330,203350,137620,182294,114044

%N Seventh derivative of f_n at x=1, where f_n is the n-th of all functions that are representable as x^x^...^x with m>=1 x's and parentheses inserted in all possible ways.

%C For the ordering of functions f_n see A215703.

%H Alois P. Heinz, <a href="/A215837/b215837.txt">Table of n, a(n) for n = 1..7813</a>

%p # load programs from A215703, then:

%p seq(A(7, n), n=1..100);

%Y Row n=7 of A215703.

%Y Number of distinct values of a(n) taken for functions with m x's: A215796.

%Y Cf. A000081, A087803.

%K sign

%O 1,2

%A _Alois P. Heinz_, Aug 24 2012