A181365 - cp's OEIS frontend

A181365 Triangle read by rows: T(n,k) is the number of 2-compositions of n having least entry equal to k (n >= 1; 0 <= k <= floor(n/2)).

n	a(n)
1	2
2	6
3	1
4	22
5	2
6	78
7	3
8	1
9	272
10	6
11	2
12	940
13	13
14	2
15	1
16	3232
17	28
18	2
19	2
20	11080
21	58
22	3
23	2
24	1
25	37920
26	118
27	6
28	2
29	2
30	129648
31	239
32	12
33	2
34	2
35	1
36	443008
37	484
38	22
39	2
40	2
41	2
42	1513248
43	979
44	37
45	3
46	2
47	2
48	1
49	5168000
50	1976
51	60
52	6
53	2
54	2
55	2
56	17647552
57	3980
58	97
59	12
60	2
61	2
62	2
63	1
64	60258304
65	8004

[2, 6, 1, 22, 2, 78, 3, 1, 272, 6, 2, 940, 13, 2, 1, 3232, 28, 2, 2, 11080, 58, 3, 2, 1, 37920, 118, 6, 2, 2, 129648, 239, 12, 2, 2, 1, 443008, 484, 22, 2, 2, 2, 1513248, 979, 37, 3, 2, 2, 1, 5168000, 1976, 60, 6, 2, 2, 2, 17647552, 3980, 97, 12, 2, 2, 2, 1, 60258304, 8004]

cp's OEIS Frontend

A181365 Triangle read by rows: T(n,k) is the number of 2-compositions of n having least entry equal to k (n >= 1; 0 <= k <= floor(n/2)).

Table of values

List of values