A181371 - cp's OEIS frontend

A181371 Triangle read by rows: T(n,k) is the number of ternary words (i.e., finite sequences of 0's, 1's and 2's) of length n having k occurrences of 01's (0 <= k <= floor(n/2)).

n	a(n)
0	1
1	3
2	8
3	1
4	21
5	6
6	55
7	25
8	1
9	144
10	90
11	9
12	377
13	300
14	51
15	1
16	987
17	954
18	234
19	12
20	2584
21	2939
22	951
23	86
24	1
25	6765
26	8850
27	3573
28	480
29	15
30	17711
31	26195
32	12707
33	2305
34	130
35	1
36	46368
37	76500
38	43398
39	10008
40	855
41	18
42	121393
43	221016
44	143682
45	40426
46	4740
47	183
48	1
49	317811

[1, 3, 8, 1, 21, 6, 55, 25, 1, 144, 90, 9, 377, 300, 51, 1, 987, 954, 234, 12, 2584, 2939, 951, 86, 1, 6765, 8850, 3573, 480, 15, 17711, 26195, 12707, 2305, 130, 1, 46368, 76500, 43398, 10008, 855, 18, 121393, 221016, 143682, 40426, 4740, 183, 1, 317811]

cp's OEIS Frontend

A181371 Triangle read by rows: T(n,k) is the number of ternary words (i.e., finite sequences of 0's, 1's and 2's) of length n having k occurrences of 01's (0 <= k <= floor(n/2)).

Table of values

List of values