A157897 - cp's OEIS frontend

A157897 Triangle read by rows, T(n,k) = T(n-1,k) + T(n-2,k-1) + T(n-3,k-3) + delta(n,0)*delta(k,0), T(n,k<0) = T(n

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	0
9	1
10	1
11	3
12	1
13	2
14	0
15	1
16	4
17	3
18	3
19	2
20	0
21	1
22	5
23	6
24	5
25	6
26	0
27	1
28	1
29	6
30	10
31	9
32	12
33	3
34	3
35	0
36	1
37	7
38	15
39	16
40	21
41	12
42	6
43	3
44	0
45	1
46	8
47	21
48	27
49	35
50	30
51	14
52	12
53	0
54	1
55	1
56	9
57	28
58	43
59	57
60	61
61	35
62	30
63	6
64	4
65	0
66	1
67	10
68	36
69	65
70	91
71	111
72	81
73	65
74	30
75	10
76	4
77	0
78	1
79	11
80	45
81	94
82	142
83	189
84	169
85	135
86	90
87	30
88	20
89	0
90	1

[1, 1, 0, 1, 1, 0, 1, 2, 0, 1, 1, 3, 1, 2, 0, 1, 4, 3, 3, 2, 0, 1, 5, 6, 5, 6, 0, 1, 1, 6, 10, 9, 12, 3, 3, 0, 1, 7, 15, 16, 21, 12, 6, 3, 0, 1, 8, 21, 27, 35, 30, 14, 12, 0, 1, 1, 9, 28, 43, 57, 61, 35, 30, 6, 4, 0, 1, 10, 36, 65, 91, 111, 81, 65, 30, 10, 4, 0, 1, 11, 45, 94, 142, 189, 169, 135, 90, 30, 20, 0, 1]

cp's OEIS Frontend

A157897 Triangle read by rows, T(n,k) = T(n-1,k) + T(n-2,k-1) + T(n-3,k-3) + delta(n,0)*delta(k,0), T(n,k<0) = T(n

Table of values

List of values

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	0
9	1
10	1
11	3
12	1
13	2
14	0
15	1
16	4
17	3
18	3
19	2
20	0
21	1
22	5
23	6
24	5
25	6
26	0
27	1
28	1
29	6
30	10
31	9
32	12
33	3
34	3
35	0
36	1
37	7
38	15
39	16
40	21
41	12
42	6
43	3
44	0
45	1
46	8
47	21
48	27
49	35
50	30
51	14
52	12
53	0
54	1
55	1
56	9
57	28
58	43
59	57
60	61
61	35
62	30
63	6
64	4
65	0
66	1
67	10
68	36
69	65
70	91
71	111
72	81
73	65
74	30
75	10
76	4
77	0
78	1
79	11
80	45
81	94
82	142
83	189
84	169
85	135
86	90
87	30
88	20
89	0
90	1

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	0
9	1
10	1
11	3
12	1
13	2
14	0
15	1
16	4
17	3
18	3
19	2
20	0
21	1
22	5
23	6
24	5
25	6
26	0
27	1
28	1
29	6
30	10
31	9
32	12
33	3
34	3
35	0
36	1
37	7
38	15
39	16
40	21
41	12
42	6
43	3
44	0
45	1
46	8
47	21
48	27
49	35
50	30
51	14
52	12
53	0
54	1
55	1
56	9
57	28
58	43
59	57
60	61
61	35
62	30
63	6
64	4
65	0
66	1
67	10
68	36
69	65
70	91
71	111
72	81
73	65
74	30
75	10
76	4
77	0
78	1
79	11
80	45
81	94
82	142
83	189
84	169
85	135
86	90
87	30
88	20
89	0
90	1

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	0
9	1
10	1
11	3
12	1
13	2
14	0
15	1
16	4
17	3
18	3
19	2
20	0
21	1
22	5
23	6
24	5
25	6
26	0
27	1
28	1
29	6
30	10
31	9
32	12
33	3
34	3
35	0
36	1
37	7
38	15
39	16
40	21
41	12
42	6
43	3
44	0
45	1
46	8
47	21
48	27
49	35
50	30
51	14
52	12
53	0
54	1
55	1
56	9
57	28
58	43
59	57
60	61
61	35
62	30
63	6
64	4
65	0
66	1
67	10
68	36
69	65
70	91
71	111
72	81
73	65
74	30
75	10
76	4
77	0
78	1
79	11
80	45
81	94
82	142
83	189
84	169
85	135
86	90
87	30
88	20
89	0
90	1