A071992 - cp's OEIS frontend

A071992 a(n) = 3n^2 + 2n - 4 * Sum_{k=1..n} A003159(k).

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

[1, 0, 1, 4, 5, 4, 1, 0, 1, 0, 1, 4, 5, 8, 13, 16, 17, 16, 17, 20, 21, 20, 17, 16, 17, 16, 13, 8, 5, 4, 1, 0, 1, 0, 1, 4, 5, 4, 1, 0, 1, 0, 1, 4, 5, 8, 13, 16, 17, 16, 17, 20, 21, 24, 29, 32, 37, 44, 49, 52, 53, 56, 61, 64, 65, 64, 65, 68, 69, 68, 65, 64, 65, 64, 65, 68, 69, 72, 77, 80]

cp's OEIS Frontend

A071992 a(n) = 3n^2 + 2n - 4 * Sum_{k=1..n} A003159(k).

Table of values

List of values

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

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

cp's OEIS Frontend

A071992 a(n) = 3*n^2 + 2*n - 4 * Sum_{k=1..n} A003159(k).

Table of values

List of values

A071992 a(n) = 3n^2 + 2n - 4 * Sum_{k=1..n} A003159(k).

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