OFFSET
0,3
COMMENTS
Also n-th derivative of x^(x^4) at x=1.
First term < 0: a(130).
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..400
FORMULA
E.g.f.: (x+1)^((x+1)^4).
MAPLE
a:= n-> n!*coeff(series(subs(x=x+1, (((x^x)^x)^x)^x ), x, n+1), x, n):
seq(a(n), n=0..25);
CROSSREFS
KEYWORD
sign
AUTHOR
Alois P. Heinz, Aug 21 2012
STATUS
approved