OFFSET
0,3
COMMENTS
Also n-th derivative of x^(x^(x^2)) at x=1.
First term < 0: a(272).
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..300
FORMULA
E.g.f.: (x+1)^((x+1)^((x+1)^2)).
MAPLE
a:= n-> n!*coeff(series(subs(x=x+1, x^((x^x)^x) ), x, n+1), x, n):
seq(a(n), n=0..25);
MATHEMATICA
With[{nn=30}, CoefficientList[Series[(x+1)^((x+1)^((x+1)^2)), {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 30 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Alois P. Heinz, Aug 21 2012
STATUS
approved