A205810 - cp's OEIS frontend

A205810 Irregular triangle read by rows: Whitney numbers c_{n,k} (n >= 0, 0 <= k <= 2n) of Lucas lattices.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	3
11	3
12	4
13	3
14	3
15	1
16	1
17	4
18	6
19	8
20	9
21	8
22	6
23	4
24	1
25	1
26	5
27	10
28	15
29	20
30	21
31	20
32	15
33	10
34	5
35	1
36	1
37	6
38	15
39	26
40	39
41	48
42	52
43	48
44	39
45	26
46	15
47	6
48	1
49	1
50	7
51	21
52	42
53	70
54	98
55	119
56	127
57	119
58	98
59	70
60	42
61	21
62	7
63	1

[1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 3, 3, 4, 3, 3, 1, 1, 4, 6, 8, 9, 8, 6, 4, 1, 1, 5, 10, 15, 20, 21, 20, 15, 10, 5, 1, 1, 6, 15, 26, 39, 48, 52, 48, 39, 26, 15, 6, 1, 1, 7, 21, 42, 70, 98, 119, 127, 119, 98, 70, 42, 21, 7, 1]

cp's OEIS Frontend

A205810 Irregular triangle read by rows: Whitney numbers c_{n,k} (n >= 0, 0 <= k <= 2n) of Lucas lattices.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	3
11	3
12	4
13	3
14	3
15	1
16	1
17	4
18	6
19	8
20	9
21	8
22	6
23	4
24	1
25	1
26	5
27	10
28	15
29	20
30	21
31	20
32	15
33	10
34	5
35	1
36	1
37	6
38	15
39	26
40	39
41	48
42	52
43	48
44	39
45	26
46	15
47	6
48	1
49	1
50	7
51	21
52	42
53	70
54	98
55	119
56	127
57	119
58	98
59	70
60	42
61	21
62	7
63	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	3
11	3
12	4
13	3
14	3
15	1
16	1
17	4
18	6
19	8
20	9
21	8
22	6
23	4
24	1
25	1
26	5
27	10
28	15
29	20
30	21
31	20
32	15
33	10
34	5
35	1
36	1
37	6
38	15
39	26
40	39
41	48
42	52
43	48
44	39
45	26
46	15
47	6
48	1
49	1
50	7
51	21
52	42
53	70
54	98
55	119
56	127
57	119
58	98
59	70
60	42
61	21
62	7
63	1

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	3
11	3
12	4
13	3
14	3
15	1
16	1
17	4
18	6
19	8
20	9
21	8
22	6
23	4
24	1
25	1
26	5
27	10
28	15
29	20
30	21
31	20
32	15
33	10
34	5
35	1
36	1
37	6
38	15
39	26
40	39
41	48
42	52
43	48
44	39
45	26
46	15
47	6
48	1
49	1
50	7
51	21
52	42
53	70
54	98
55	119
56	127
57	119
58	98
59	70
60	42
61	21
62	7
63	1