A120907 - cp's OEIS frontend

A120907 Triangle read by rows: T(n,k) is the number of ternary words of length n on {0,1,2} having sum of the lengths of the drops equal to k (n>=0, k>=0). The drops of a ternary word on {0,1,2} are the subwords 10,20 and 21, their lengths being the differences 1, 2 and 1, respectively.

n	a(n)
0	1
1	3
2	6
3	2
4	1
5	10
6	10
7	7
8	15
9	30
10	31
11	4
12	1
13	21
14	70
15	105
16	36
17	11
18	28
19	140
20	294
21	184
22	76
23	6
24	1
25	36
26	252
27	714
28	696
29	396
30	78
31	15
32	45
33	420
34	1554
35	2160
36	1666
37	566
38	141
39	8
40	1
41	55
42	660
43	3102
44	5808
45	5918
46	2990
47	995
48	136
49	19
50	66
51	990
52	5775
53	13992
54	18348
55	12746
56	5615
57	1280
58	226

[1, 3, 6, 2, 1, 10, 10, 7, 15, 30, 31, 4, 1, 21, 70, 105, 36, 11, 28, 140, 294, 184, 76, 6, 1, 36, 252, 714, 696, 396, 78, 15, 45, 420, 1554, 2160, 1666, 566, 141, 8, 1, 55, 660, 3102, 5808, 5918, 2990, 995, 136, 19, 66, 990, 5775, 13992, 18348, 12746, 5615, 1280, 226]

cp's OEIS Frontend

A120907 Triangle read by rows: T(n,k) is the number of ternary words of length n on {0,1,2} having sum of the lengths of the drops equal to k (n>=0, k>=0). The drops of a ternary word on {0,1,2} are the subwords 10,20 and 21, their lengths being the differences 1, 2 and 1, respectively.

Table of values

List of values