A057817 - cp's OEIS frontend

A057817 Moebius invariant of cographic hyperplane arrangement for complete graph K_n. Also value of Tutte dichromatic polynomial T_G(0,1) for G=K_n. Also alternating sum F_{n,1} - F_{n,2} + F_{n,3} - ..., where F_{n,k} is the number of labeled forests on n nodes with k connected components.

n	a(n)
1	1
2	0
3	1
4	6
5	51
6	560
7	7575
8	122052
9	2285353
10	48803904
11	1171278945
12	31220505800
13	915350812299
14	29281681800384
15	1015074250155511
16	37909738774479600
17	1517587042234033425
18	64830903253553212928
19	2944016994706445303937

[1, 0, 1, 6, 51, 560, 7575, 122052, 2285353, 48803904, 1171278945, 31220505800, 915350812299, 29281681800384, 1015074250155511, 37909738774479600, 1517587042234033425, 64830903253553212928, 2944016994706445303937]

cp's OEIS Frontend

A057817 Moebius invariant of cographic hyperplane arrangement for complete graph K_n. Also value of Tutte dichromatic polynomial T_G(0,1) for G=K_n. Also alternating sum F_{n,1} - F_{n,2} + F_{n,3} - ..., where F_{n,k} is the number of labeled forests on n nodes with k connected components.

Table of values

List of values