|
|
A293255
|
|
G.f.: Product_{m>0} (1 - x^m + 2!*x^(2*m) - 3!*x^(3*m)).
|
|
2
|
|
|
1, -1, 1, -6, 0, 3, 4, -3, -8, 22, 12, 6, 3, -22, -62, 61, -2, 68, -166, 68, -14, -216, -53, 196, -12, 304, -15, -32, -322, 24, 274, -112, -294, 832, 638, -213, 918, -474, -570, -854, -1227, -1018, 3476, -2038, 588, -1382, 3520, -578, -248, -1314, -292, -8825
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,4
|
|
LINKS
|
|
|
MAPLE
|
b:= proc(n, i) option remember; `if`(n=0, 1, `if`(i<1, 0,
add(b(n-i*j, i-1)*j!*(-1)^j, j=0..min(3, n/i))))
end:
a:= n-> b(n$2):
|
|
CROSSREFS
|
|
|
KEYWORD
|
sign
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|