A292999 - cp's OEIS frontend

A292999 Triangle read by rows: T(n,k) (n >= 1, 4 <= k <= n+3) is the number of k-sequences of balls colored with at most n colors such that exactly four balls are the same color as some other ball in the sequence.

n	a(n)
1	1
2	8
3	10
4	21
5	120
6	90
7	40
8	420
9	1440
10	840
11	65
12	1000
13	6300
14	16800
15	8400
16	96
17	1950
18	18000
19	88200
20	201600
21	90720
22	133
23	3360
24	40950
25	294000
26	1234800
27	2540160
28	1058400
29	176
30	5320
31	80640
32	764400
33	4704000
34	17781120
35	33868800
36	13305600
37	225
38	7920
39	143640
40	1693440
41	13759200
42	76204800
43	266716800
44	479001600
45	179625600

[1, 8, 10, 21, 120, 90, 40, 420, 1440, 840, 65, 1000, 6300, 16800, 8400, 96, 1950, 18000, 88200, 201600, 90720, 133, 3360, 40950, 294000, 1234800, 2540160, 1058400, 176, 5320, 80640, 764400, 4704000, 17781120, 33868800, 13305600, 225, 7920, 143640, 1693440, 13759200, 76204800, 266716800, 479001600, 179625600]

cp's OEIS Frontend

A292999 Triangle read by rows: T(n,k) (n >= 1, 4 <= k <= n+3) is the number of k-sequences of balls colored with at most n colors such that exactly four balls are the same color as some other ball in the sequence.

Table of values

List of values