A105477 - cp's OEIS frontend

A105477 Triangle read by rows: T(n,k) is the number of compositions of n into k parts when there are two kinds of part 2.

n	a(n)
1	1
2	2
3	1
4	1
5	4
6	1
7	1
8	6
9	6
10	1
11	1
12	6
13	15
14	8
15	1
16	1
17	7
18	23
19	28
20	10
21	1
22	1
23	8
24	30
25	60
26	45
27	12
28	1
29	1
30	9
31	39
32	98
33	125
34	66
35	14
36	1
37	1
38	10
39	49
40	144
41	255
42	226
43	91
44	16
45	1
46	1
47	11
48	60
49	202
50	437
51	561
52	371
53	120
54	18
55	1
56	1
57	12
58	72
59	272
60	685
61	1128
62	1092
63	568
64	153
65	20
66	1
67	1
68	13
69	85
70	355
71	1015
72	1995
73	2555

[1, 2, 1, 1, 4, 1, 1, 6, 6, 1, 1, 6, 15, 8, 1, 1, 7, 23, 28, 10, 1, 1, 8, 30, 60, 45, 12, 1, 1, 9, 39, 98, 125, 66, 14, 1, 1, 10, 49, 144, 255, 226, 91, 16, 1, 1, 11, 60, 202, 437, 561, 371, 120, 18, 1, 1, 12, 72, 272, 685, 1128, 1092, 568, 153, 20, 1, 1, 13, 85, 355, 1015, 1995, 2555]

cp's OEIS Frontend

A105477 Triangle read by rows: T(n,k) is the number of compositions of n into k parts when there are two kinds of part 2.

Table of values

List of values