A180446 - cp's OEIS frontend

A180446 Number of non-pentagonal numbers <= n.

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

[0, 0, 1, 2, 3, 3, 4, 5, 6, 7, 8, 9, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 63, 64, 65, 66]

cp's OEIS Frontend

A180446 Number of non-pentagonal numbers <= n.

Table of values

List of values

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

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

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