A281871 - cp's OEIS frontend

A281871 Number T(n,k) of k-element subsets of [n] having a square element sum; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

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

[1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 2, 1, 1, 0, 1, 2, 2, 2, 0, 0, 1, 2, 3, 3, 2, 1, 0, 1, 2, 4, 5, 5, 2, 1, 0, 1, 2, 5, 8, 8, 6, 3, 0, 1, 1, 3, 6, 11, 14, 13, 7, 4, 1, 0, 1, 3, 7, 15, 23, 24, 19, 10, 3, 1, 0, 1, 3, 8, 20, 34, 43, 39, 25, 13, 3, 1, 0, 1, 3, 9, 26, 49, 71, 74, 60, 34, 14, 5, 0, 0]

cp's OEIS Frontend

A281871 Number T(n,k) of k-element subsets of [n] having a square element sum; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

List of values

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

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

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