|
| |
|
|
A007987
|
|
Number of irreducible words of length 2n in the free group with generators x,y such that the total degree of x and the total degree of y both equal zero.
|
|
1
|
|
|
|
1, 0, 8, 40, 312, 2240, 17280, 134568, 1071000, 8627872, 70302888, 577920200, 4786740112, 39899052960, 334391846048, 2815803070920, 23809393390680, 202061204197632, 1720404406215720, 14690717541313128, 125775000062934552
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
| |
| |
|
|
