A120906 - cp's OEIS frontend

A120906 Triangle read by rows: T(n,k) is the number of ternary words of length n on {0,1,2} having k drops (n>=0, k>=0). The drops of a ternary word on {0,1,2} are the subwords 10,20 and 21.

n	a(n)
0	1
1	3
2	6
3	3
4	10
5	16
6	1
7	15
8	51
9	15
10	21
11	126
12	90
13	6
14	28
15	266
16	357
17	77
18	1
19	36
20	504
21	1107
22	504
23	36
24	45
25	882
26	2907
27	2304
28	414
29	9
30	55
31	1452
32	6765
33	8350
34	2850
35	210
36	1
37	66
38	2277
39	14355
40	25653
41	14355
42	2277
43	66
44	78
45	3432
46	28314
47	69576
48	58278
49	16236
50	1221
51	12
52	91
53	5005

[1, 3, 6, 3, 10, 16, 1, 15, 51, 15, 21, 126, 90, 6, 28, 266, 357, 77, 1, 36, 504, 1107, 504, 36, 45, 882, 2907, 2304, 414, 9, 55, 1452, 6765, 8350, 2850, 210, 1, 66, 2277, 14355, 25653, 14355, 2277, 66, 78, 3432, 28314, 69576, 58278, 16236, 1221, 12, 91, 5005]

cp's OEIS Frontend

A120906 Triangle read by rows: T(n,k) is the number of ternary words of length n on {0,1,2} having k drops (n>=0, k>=0). The drops of a ternary word on {0,1,2} are the subwords 10,20 and 21.

Table of values

List of values