A215561 - cp's OEIS frontend

A215561 Number A(n,k) of permutations of k indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations; square array A(n,k), n>=0, k>=0, read by antidiagonals.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	2
13	3
14	1
15	1
16	1
17	5
18	30
19	7
20	1
21	1
22	1
23	14
24	420
25	403
26	35
27	1
28	1
29	1
30	42
31	6930
32	40350
33	18720
34	139
35	1
36	1
37	1
38	132
39	126126
40	5223915
41	19369350
42	746192
43	1001
44	1
45	1
46	1
47	429
48	2450448
49	783353872
50	27032968200
51	9212531290
52	71892912
53	5701
54	1

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 1, 1, 1, 5, 30, 7, 1, 1, 1, 14, 420, 403, 35, 1, 1, 1, 42, 6930, 40350, 18720, 139, 1, 1, 1, 132, 126126, 5223915, 19369350, 746192, 1001, 1, 1, 1, 429, 2450448, 783353872, 27032968200, 9212531290, 71892912, 5701, 1]

cp's OEIS Frontend

A215561 Number A(n,k) of permutations of k indistinguishable copies of 1..n with every partial sum <= the same partial sum averaged over all permutations; square array A(n,k), n>=0, k>=0, read by antidiagonals.

Table of values

List of values