OFFSET
0,3
COMMENTS
FORMULA
a(n) = numerator(r(n)), with the rationals (in lowest terms) r(n) = [x^n/n!] (3/(2*log(1+x)))*(1 - 1/(1+x)^(2/3)).
EXAMPLE
The rationals r(n) begin: 1, -1/3, 13/27, -32/27, 1666/405, -13426/729, 515194/5103, -1432000/2187, 1447711256/295245, -4097653768/98415, 256749458824/649539, ...
The z-sequence is {2*r(n)}, n >= 0.
The nontrivial recurrence for A225466(4, 0) = 16 from this z-sequence is: 16 = 8*(1*8 + (-1/3)*117 + (13/27)*135 + (-32/27)*27).
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Wolfdieter Lang, Apr 09 2017
STATUS
approved