A172237 - cp's OEIS frontend

A172237 T(n,k) = T(n-1,k) + k*T(n-2,k) for k >= 1 and n >= 3 with T(0,k) = 0 and T(1,k) = T(2,k) = 1 for all k >= 1; array T(n,k), read by descending antidiagonals, with n >= 0 and k >= 1.

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	0
11	1
12	1
13	3
14	3
15	0
16	1
17	1
18	4
19	5
20	5
21	0
22	1
23	1
24	5
25	7
26	11
27	8
28	0
29	1
30	1
31	6
32	9
33	19
34	21
35	13
36	0
37	1
38	1
39	7
40	11
41	29
42	40
43	43
44	21
45	0
46	1
47	1
48	8
49	13
50	41
51	65
52	97
53	85
54	34
55	0
56	1
57	1
58	9
59	15
60	55
61	96
62	181
63	217
64	171
65	55
66	0
67	1
68	1
69	10
70	17
71	71
72	133
73	301
74	441
75	508
76	341
77	89
78	0
79	1
80	1
81	11

[0, 0, 1, 0, 1, 1, 0, 1, 1, 2, 0, 1, 1, 3, 3, 0, 1, 1, 4, 5, 5, 0, 1, 1, 5, 7, 11, 8, 0, 1, 1, 6, 9, 19, 21, 13, 0, 1, 1, 7, 11, 29, 40, 43, 21, 0, 1, 1, 8, 13, 41, 65, 97, 85, 34, 0, 1, 1, 9, 15, 55, 96, 181, 217, 171, 55, 0, 1, 1, 10, 17, 71, 133, 301, 441, 508, 341, 89, 0, 1, 1, 11]

cp's OEIS Frontend

A172237 T(n,k) = T(n-1,k) + k*T(n-2,k) for k >= 1 and n >= 3 with T(0,k) = 0 and T(1,k) = T(2,k) = 1 for all k >= 1; array T(n,k), read by descending antidiagonals, with n >= 0 and k >= 1.

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	0
11	1
12	1
13	3
14	3
15	0
16	1
17	1
18	4
19	5
20	5
21	0
22	1
23	1
24	5
25	7
26	11
27	8
28	0
29	1
30	1
31	6
32	9
33	19
34	21
35	13
36	0
37	1
38	1
39	7
40	11
41	29
42	40
43	43
44	21
45	0
46	1
47	1
48	8
49	13
50	41
51	65
52	97
53	85
54	34
55	0
56	1
57	1
58	9
59	15
60	55
61	96
62	181
63	217
64	171
65	55
66	0
67	1
68	1
69	10
70	17
71	71
72	133
73	301
74	441
75	508
76	341
77	89
78	0
79	1
80	1
81	11

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	0
11	1
12	1
13	3
14	3
15	0
16	1
17	1
18	4
19	5
20	5
21	0
22	1
23	1
24	5
25	7
26	11
27	8
28	0
29	1
30	1
31	6
32	9
33	19
34	21
35	13
36	0
37	1
38	1
39	7
40	11
41	29
42	40
43	43
44	21
45	0
46	1
47	1
48	8
49	13
50	41
51	65
52	97
53	85
54	34
55	0
56	1
57	1
58	9
59	15
60	55
61	96
62	181
63	217
64	171
65	55
66	0
67	1
68	1
69	10
70	17
71	71
72	133
73	301
74	441
75	508
76	341
77	89
78	0
79	1
80	1
81	11

n	a(n)
0	0
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	0
11	1
12	1
13	3
14	3
15	0
16	1
17	1
18	4
19	5
20	5
21	0
22	1
23	1
24	5
25	7
26	11
27	8
28	0
29	1
30	1
31	6
32	9
33	19
34	21
35	13
36	0
37	1
38	1
39	7
40	11
41	29
42	40
43	43
44	21
45	0
46	1
47	1
48	8
49	13
50	41
51	65
52	97
53	85
54	34
55	0
56	1
57	1
58	9
59	15
60	55
61	96
62	181
63	217
64	171
65	55
66	0
67	1
68	1
69	10
70	17
71	71
72	133
73	301
74	441
75	508
76	341
77	89
78	0
79	1
80	1
81	11