A128235 - cp's OEIS frontend

A128235 Triangle read by rows: T(n,k) is the number of sequences of length n on the alphabet {0,1,2,3}, containing k subsequences 00 (0<=k<=n-1).

n	a(n)
0	1
1	4
2	15
3	1
4	57
5	6
6	1
7	216
8	33
9	6
10	1
11	819
12	162
13	36
14	6
15	1
16	3105
17	756
18	189
19	39
20	6
21	1
22	11772
23	3402
24	945
25	216
26	42
27	6
28	1
29	44631
30	14931
31	4536
32	1143
33	243
34	45
35	6
36	1
37	169209
38	64314
39	21168
40	5778
41	1350
42	270
43	48
44	6
45	1
46	641520
47	273051
48	96633
49	28323
50	7128
51	1566
52	297
53	51

[1, 4, 15, 1, 57, 6, 1, 216, 33, 6, 1, 819, 162, 36, 6, 1, 3105, 756, 189, 39, 6, 1, 11772, 3402, 945, 216, 42, 6, 1, 44631, 14931, 4536, 1143, 243, 45, 6, 1, 169209, 64314, 21168, 5778, 1350, 270, 48, 6, 1, 641520, 273051, 96633, 28323, 7128, 1566, 297, 51]

cp's OEIS Frontend

A128235 Triangle read by rows: T(n,k) is the number of sequences of length n on the alphabet {0,1,2,3}, containing k subsequences 00 (0<=k<=n-1).

Table of values

List of values