A217209 - cp's OEIS frontend

A217209 Irregular triangle read by rows: T(n,k) (n>=1, 1 <= k <= A217208(n)) = number of strings of n 2's and 3's having a tail of length k.

n	a(n)
1	2
2	2
3	1
4	1
5	4
6	2
7	2
8	6
9	5
10	3
11	1
12	1
13	12
14	9
15	6
16	2
17	3
18	20
19	18
20	12
21	6
22	7
23	0
24	0
25	0
26	1
27	40
28	34
29	25
30	11
31	14
32	1
33	0
34	1
35	2
36	74
37	71
38	47
39	24
40	28
41	1
42	3
43	2
44	3
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	0
92	0
93	2
94	1

[2, 2, 1, 1, 4, 2, 2, 6, 5, 3, 1, 1, 12, 9, 6, 2, 3, 20, 18, 12, 6, 7, 0, 0, 0, 1, 40, 34, 25, 11, 14, 1, 0, 1, 2, 74, 71, 47, 24, 28, 1, 3, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1]

cp's OEIS Frontend

A217209 Irregular triangle read by rows: T(n,k) (n>=1, 1 <= k <= A217208(n)) = number of strings of n 2's and 3's having a tail of length k.

Table of values

List of values

n	a(n)
1	2
2	2
3	1
4	1
5	4
6	2
7	2
8	6
9	5
10	3
11	1
12	1
13	12
14	9
15	6
16	2
17	3
18	20
19	18
20	12
21	6
22	7
23	0
24	0
25	0
26	1
27	40
28	34
29	25
30	11
31	14
32	1
33	0
34	1
35	2
36	74
37	71
38	47
39	24
40	28
41	1
42	3
43	2
44	3
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	0
92	0
93	2
94	1

n	a(n)
1	2
2	2
3	1
4	1
5	4
6	2
7	2
8	6
9	5
10	3
11	1
12	1
13	12
14	9
15	6
16	2
17	3
18	20
19	18
20	12
21	6
22	7
23	0
24	0
25	0
26	1
27	40
28	34
29	25
30	11
31	14
32	1
33	0
34	1
35	2
36	74
37	71
38	47
39	24
40	28
41	1
42	3
43	2
44	3
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	0
92	0
93	2
94	1

n	a(n)
1	2
2	2
3	1
4	1
5	4
6	2
7	2
8	6
9	5
10	3
11	1
12	1
13	12
14	9
15	6
16	2
17	3
18	20
19	18
20	12
21	6
22	7
23	0
24	0
25	0
26	1
27	40
28	34
29	25
30	11
31	14
32	1
33	0
34	1
35	2
36	74
37	71
38	47
39	24
40	28
41	1
42	3
43	2
44	3
45	0
46	0
47	0
48	0
49	0
50	0
51	0
52	0
53	0
54	0
55	0
56	0
57	0
58	0
59	0
60	0
61	0
62	0
63	0
64	0
65	0
66	0
67	0
68	0
69	0
70	0
71	0
72	0
73	0
74	0
75	0
76	0
77	0
78	0
79	0
80	0
81	0
82	0
83	0
84	0
85	0
86	0
87	0
88	0
89	0
90	0
91	0
92	0
93	2
94	1