A169888 - cp's OEIS frontend

A169888 Number of n-member subsets of 1..2n whose elements sum to a multiple of n.

n	a(n)
0	1
1	2
2	2
3	8
4	18
5	52
6	152
7	492
8	1618
9	5408
10	18452
11	64132
12	225432
13	800048
14	2865228
15	10341208
16	37568338
17	137270956
18	504171584
19	1860277044
20	6892335668
21	25631327688
22	95640829924
23	357975249028
24	1343650267288
25	5056424257552
26	19073789328752
27	72108867620204

[1, 2, 2, 8, 18, 52, 152, 492, 1618, 5408, 18452, 64132, 225432, 800048, 2865228, 10341208, 37568338, 137270956, 504171584, 1860277044, 6892335668, 25631327688, 95640829924, 357975249028, 1343650267288, 5056424257552, 19073789328752, 72108867620204]

cp's OEIS Frontend

A169888 Number of n-member subsets of 1..2n whose elements sum to a multiple of n.

Table of values

List of values