A288887 - cp's OEIS frontend

A288887 Triangle read by rows: T(n,k) is the number of times k is a member of a sum-free subset of {1, ..., n} for 1 <= k <= n.

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	3
7	3
8	2
9	4
10	3
11	5
12	3
13	7
14	5
15	7
16	7
17	5
18	7
19	8
20	10
21	8
22	12
23	8
24	12
25	13
26	17
27	13
28	18
29	16
30	13
31	17
32	13
33	23
34	18
35	25
36	19
37	28
38	21
39	30
40	21
41	40
42	32
43	43
44	32
45	47
46	37
47	29
48	40
49	29
50	40
51	45
52	57
53	45
54	63
55	43
56	62
57	44
58	66
59	45
60	65
61	72
62	95
63	71
64	104
65	70
66	102
67	85
68	66
69	95
70	71
71	89
72	72
73	132
74	109
75	139
76	104
77	142
78	116

[1, 1, 1, 2, 2, 3, 3, 2, 4, 3, 5, 3, 7, 5, 7, 7, 5, 7, 8, 10, 8, 12, 8, 12, 13, 17, 13, 18, 16, 13, 17, 13, 23, 18, 25, 19, 28, 21, 30, 21, 40, 32, 43, 32, 47, 37, 29, 40, 29, 40, 45, 57, 45, 63, 43, 62, 44, 66, 45, 65, 72, 95, 71, 104, 70, 102, 85, 66, 95, 71, 89, 72, 132, 109, 139, 104, 142, 116]

cp's OEIS Frontend

A288887 Triangle read by rows: T(n,k) is the number of times k is a member of a sum-free subset of {1, ..., n} for 1 <= k <= n.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	3
7	3
8	2
9	4
10	3
11	5
12	3
13	7
14	5
15	7
16	7
17	5
18	7
19	8
20	10
21	8
22	12
23	8
24	12
25	13
26	17
27	13
28	18
29	16
30	13
31	17
32	13
33	23
34	18
35	25
36	19
37	28
38	21
39	30
40	21
41	40
42	32
43	43
44	32
45	47
46	37
47	29
48	40
49	29
50	40
51	45
52	57
53	45
54	63
55	43
56	62
57	44
58	66
59	45
60	65
61	72
62	95
63	71
64	104
65	70
66	102
67	85
68	66
69	95
70	71
71	89
72	72
73	132
74	109
75	139
76	104
77	142
78	116

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	3
7	3
8	2
9	4
10	3
11	5
12	3
13	7
14	5
15	7
16	7
17	5
18	7
19	8
20	10
21	8
22	12
23	8
24	12
25	13
26	17
27	13
28	18
29	16
30	13
31	17
32	13
33	23
34	18
35	25
36	19
37	28
38	21
39	30
40	21
41	40
42	32
43	43
44	32
45	47
46	37
47	29
48	40
49	29
50	40
51	45
52	57
53	45
54	63
55	43
56	62
57	44
58	66
59	45
60	65
61	72
62	95
63	71
64	104
65	70
66	102
67	85
68	66
69	95
70	71
71	89
72	72
73	132
74	109
75	139
76	104
77	142
78	116

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	3
7	3
8	2
9	4
10	3
11	5
12	3
13	7
14	5
15	7
16	7
17	5
18	7
19	8
20	10
21	8
22	12
23	8
24	12
25	13
26	17
27	13
28	18
29	16
30	13
31	17
32	13
33	23
34	18
35	25
36	19
37	28
38	21
39	30
40	21
41	40
42	32
43	43
44	32
45	47
46	37
47	29
48	40
49	29
50	40
51	45
52	57
53	45
54	63
55	43
56	62
57	44
58	66
59	45
60	65
61	72
62	95
63	71
64	104
65	70
66	102
67	85
68	66
69	95
70	71
71	89
72	72
73	132
74	109
75	139
76	104
77	142
78	116