A137278 - cp's OEIS frontend

A137278 Triangle read by rows: g(n,k) = number of ideals of size k in a garland (or double fence) of order n.

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	3
13	3
14	3
15	1
16	1
17	4
18	6
19	6
20	7
21	6
22	6
23	4
24	1
25	1
26	5
27	10
28	12
29	14
30	15
31	14
32	12
33	10
34	5
35	1
36	1
37	6
38	15
39	22
40	27
41	32
42	33
43	32
44	27
45	22
46	15
47	6
48	1
49	1
50	7
51	21
52	37
53	50
54	63
55	72
56	75
57	72
58	63
59	50
60	37
61	21
62	7
63	1
64	1
65	8
66	28
67	58
68	88
69	118
70	146
71	164
72	171
73	164
74	146
75	118
76	88
77	58
78	28
79	8
80	1

[1, 1, 1, 1, 1, 2, 1, 2, 1, 1, 3, 3, 3, 3, 3, 1, 1, 4, 6, 6, 7, 6, 6, 4, 1, 1, 5, 10, 12, 14, 15, 14, 12, 10, 5, 1, 1, 6, 15, 22, 27, 32, 33, 32, 27, 22, 15, 6, 1, 1, 7, 21, 37, 50, 63, 72, 75, 72, 63, 50, 37, 21, 7, 1, 1, 8, 28, 58, 88, 118, 146, 164, 171, 164, 146, 118, 88, 58, 28, 8, 1]

cp's OEIS Frontend

A137278 Triangle read by rows: g(n,k) = number of ideals of size k in a garland (or double fence) of order n.

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	3
13	3
14	3
15	1
16	1
17	4
18	6
19	6
20	7
21	6
22	6
23	4
24	1
25	1
26	5
27	10
28	12
29	14
30	15
31	14
32	12
33	10
34	5
35	1
36	1
37	6
38	15
39	22
40	27
41	32
42	33
43	32
44	27
45	22
46	15
47	6
48	1
49	1
50	7
51	21
52	37
53	50
54	63
55	72
56	75
57	72
58	63
59	50
60	37
61	21
62	7
63	1
64	1
65	8
66	28
67	58
68	88
69	118
70	146
71	164
72	171
73	164
74	146
75	118
76	88
77	58
78	28
79	8
80	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	3
13	3
14	3
15	1
16	1
17	4
18	6
19	6
20	7
21	6
22	6
23	4
24	1
25	1
26	5
27	10
28	12
29	14
30	15
31	14
32	12
33	10
34	5
35	1
36	1
37	6
38	15
39	22
40	27
41	32
42	33
43	32
44	27
45	22
46	15
47	6
48	1
49	1
50	7
51	21
52	37
53	50
54	63
55	72
56	75
57	72
58	63
59	50
60	37
61	21
62	7
63	1
64	1
65	8
66	28
67	58
68	88
69	118
70	146
71	164
72	171
73	164
74	146
75	118
76	88
77	58
78	28
79	8
80	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	3
13	3
14	3
15	1
16	1
17	4
18	6
19	6
20	7
21	6
22	6
23	4
24	1
25	1
26	5
27	10
28	12
29	14
30	15
31	14
32	12
33	10
34	5
35	1
36	1
37	6
38	15
39	22
40	27
41	32
42	33
43	32
44	27
45	22
46	15
47	6
48	1
49	1
50	7
51	21
52	37
53	50
54	63
55	72
56	75
57	72
58	63
59	50
60	37
61	21
62	7
63	1
64	1
65	8
66	28
67	58
68	88
69	118
70	146
71	164
72	171
73	164
74	146
75	118
76	88
77	58
78	28
79	8
80	1