A261981 - cp's OEIS frontend

A261981 Number T(n,k) of compositions of n such that k is the minimal distance between two identical parts; triangle T(n,k), n>=2, 1<=k<=floor((sqrt(8*n-7)-1)/2), read by rows.

n	a(n)
2	1
3	1
4	4
5	1
6	9
7	2
8	18
9	3
10	41
11	8
12	2
13	89
14	16
15	4
16	185
17	34
18	10
19	388
20	57
21	10
22	810
23	113
24	30
25	6
26	1670
27	213
28	52
29	12
30	3435
31	396
32	104
33	28
34	7040
35	733
36	176
37	50
38	14360
39	1333
40	278
41	62
42	29226
43	2419
44	512
45	152
46	24
47	59347
48	4400
49	878
50	246
51	48
52	120229
53	7934
54	1492
55	458
56	108

[1, 1, 4, 1, 9, 2, 18, 3, 41, 8, 2, 89, 16, 4, 185, 34, 10, 388, 57, 10, 810, 113, 30, 6, 1670, 213, 52, 12, 3435, 396, 104, 28, 7040, 733, 176, 50, 14360, 1333, 278, 62, 29226, 2419, 512, 152, 24, 59347, 4400, 878, 246, 48, 120229, 7934, 1492, 458, 108]

cp's OEIS Frontend

A261981 Number T(n,k) of compositions of n such that k is the minimal distance between two identical parts; triangle T(n,k), n>=2, 1<=k<=floor((sqrt(8*n-7)-1)/2), read by rows.

Table of values

List of values