A119326 - cp's OEIS frontend

A119326 Number triangle T(n,k) = Sum_{j=0..n-k} C(k,2j)*C(n-k,2j).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	2
13	1
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	1
23	7
24	10
25	7
26	1
27	1
28	1
29	1
30	11
31	19
32	19
33	11
34	1
35	1
36	1
37	1
38	16
39	31
40	38
41	31
42	16
43	1
44	1
45	1
46	1
47	22
48	46
49	66
50	66
51	46
52	22
53	1
54	1
55	1
56	1
57	29
58	64
59	106
60	126
61	106
62	64
63	29
64	1
65	1
66	1
67	1
68	37
69	85
70	162
71	226
72	226
73	162
74	85
75	37
76	1
77	1

[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 4, 4, 1, 1, 1, 1, 7, 10, 7, 1, 1, 1, 1, 11, 19, 19, 11, 1, 1, 1, 1, 16, 31, 38, 31, 16, 1, 1, 1, 1, 22, 46, 66, 66, 46, 22, 1, 1, 1, 1, 29, 64, 106, 126, 106, 64, 29, 1, 1, 1, 1, 37, 85, 162, 226, 226, 162, 85, 37, 1, 1]

cp's OEIS Frontend

A119326 Number triangle T(n,k) = Sum_{j=0..n-k} C(k,2j)*C(n-k,2j).

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	2
13	1
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	1
23	7
24	10
25	7
26	1
27	1
28	1
29	1
30	11
31	19
32	19
33	11
34	1
35	1
36	1
37	1
38	16
39	31
40	38
41	31
42	16
43	1
44	1
45	1
46	1
47	22
48	46
49	66
50	66
51	46
52	22
53	1
54	1
55	1
56	1
57	29
58	64
59	106
60	126
61	106
62	64
63	29
64	1
65	1
66	1
67	1
68	37
69	85
70	162
71	226
72	226
73	162
74	85
75	37
76	1
77	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	2
13	1
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	1
23	7
24	10
25	7
26	1
27	1
28	1
29	1
30	11
31	19
32	19
33	11
34	1
35	1
36	1
37	1
38	16
39	31
40	38
41	31
42	16
43	1
44	1
45	1
46	1
47	22
48	46
49	66
50	66
51	46
52	22
53	1
54	1
55	1
56	1
57	29
58	64
59	106
60	126
61	106
62	64
63	29
64	1
65	1
66	1
67	1
68	37
69	85
70	162
71	226
72	226
73	162
74	85
75	37
76	1
77	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	1
9	1
10	1
11	1
12	2
13	1
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	1
23	7
24	10
25	7
26	1
27	1
28	1
29	1
30	11
31	19
32	19
33	11
34	1
35	1
36	1
37	1
38	16
39	31
40	38
41	31
42	16
43	1
44	1
45	1
46	1
47	22
48	46
49	66
50	66
51	46
52	22
53	1
54	1
55	1
56	1
57	29
58	64
59	106
60	126
61	106
62	64
63	29
64	1
65	1
66	1
67	1
68	37
69	85
70	162
71	226
72	226
73	162
74	85
75	37
76	1
77	1