A213743 - cp's OEIS frontend

A213743 Triangle T(n,k), read by rows, of numbers T(n,k)=C^(4)(n,k) of combinations with repetitions from n different elements over k for each of them not more than four appearances allowed.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	3
6	1
7	3
8	6
9	10
10	1
11	4
12	10
13	20
14	35
15	1
16	5
17	15
18	35
19	70
20	121
21	1
22	6
23	21
24	56
25	126
26	246
27	426
28	1
29	7
30	28
31	84
32	210
33	455
34	875
35	1520
36	1
37	8
38	36
39	120
40	330
41	784
42	1652
43	3144
44	5475
45	1
46	9
47	45
48	165
49	495
50	1278
51	2922
52	6030
53	11385
54	19855
55	1
56	10
57	55
58	220
59	715
60	1992
61	4905
62	10890
63	22110
64	41470
65	72403

[1, 1, 1, 1, 2, 3, 1, 3, 6, 10, 1, 4, 10, 20, 35, 1, 5, 15, 35, 70, 121, 1, 6, 21, 56, 126, 246, 426, 1, 7, 28, 84, 210, 455, 875, 1520, 1, 8, 36, 120, 330, 784, 1652, 3144, 5475, 1, 9, 45, 165, 495, 1278, 2922, 6030, 11385, 19855, 1, 10, 55, 220, 715, 1992, 4905, 10890, 22110, 41470, 72403]

cp's OEIS Frontend

A213743 Triangle T(n,k), read by rows, of numbers T(n,k)=C^(4)(n,k) of combinations with repetitions from n different elements over k for each of them not more than four appearances allowed.

Table of values

List of values