A374440 - cp's OEIS frontend

A374440 Triangle read by rows: T(n, k) = T(n - 1, k) + T(n - 2, k - 2), with boundary conditions: if k = 0 or k = 2 then T = 1; if k = 1 then T = n - 1.

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

[1, 1, 0, 1, 1, 1, 1, 2, 1, 0, 1, 3, 1, 1, 1, 1, 4, 1, 3, 2, 0, 1, 5, 1, 6, 3, 1, 1, 1, 6, 1, 10, 4, 4, 3, 0, 1, 7, 1, 15, 5, 10, 6, 1, 1, 1, 8, 1, 21, 6, 20, 10, 5, 4, 0, 1, 9, 1, 28, 7, 35, 15, 15, 10, 1, 1, 1, 10, 1, 36, 8, 56, 21, 35, 20, 6, 5, 0]

cp's OEIS Frontend

A374440 Triangle read by rows: T(n, k) = T(n - 1, k) + T(n - 2, k - 2), with boundary conditions: if k = 0 or k = 2 then T = 1; if k = 1 then T = n - 1.

Table of values

List of values

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

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

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