A213937 - cp's OEIS frontend

A213937 Row sums a(n) of triangle A213936: number of representative necklaces with n beads (C_N symmetry) corresponding to all color signatures given by the partitions [1^n], [2,1^(n-2)], ..., [n-1,1], [n].

n	a(n)
1	1
2	2
3	4
4	11
5	42
6	207
7	1238
8	8661
9	69282
10	623531
11	6235302
12	68588313
13	823059746
14	10699776687
15	149796873606
16	2246953104077
17	35951249665218
18	611171244308691
19	11001082397556422
20	209020565553572001

[1, 2, 4, 11, 42, 207, 1238, 8661, 69282, 623531, 6235302, 68588313, 823059746, 10699776687, 149796873606, 2246953104077, 35951249665218, 611171244308691, 11001082397556422, 209020565553572001]

cp's OEIS Frontend

A213937 Row sums a(n) of triangle A213936: number of representative necklaces with n beads (C_N symmetry) corresponding to all color signatures given by the partitions [1^n], [2,1^(n-2)], ..., [n-1,1], [n].

Table of values

List of values