A213524 - cp's OEIS frontend

A213524 Numbers not representable as the sum of three octagonal numbers.

n	a(n)
1	4
2	5
3	6
4	7
5	11
6	12
7	13
8	14
9	15
10	18
11	19
12	20
13	25
14	26
15	27
16	28
17	31
18	32
19	33
20	34
21	35
22	36
23	38
24	39
25	44
26	45
27	46
28	47
29	51
30	52
31	53
32	54
33	55
34	57
35	58
36	59
37	60
38	64
39	68
40	70
41	71
42	72
43	75
44	76
45	77
46	78
47	79
48	83
49	84
50	85
51	89
52	90
53	91
54	92
55	93
56	95
57	99
58	100
59	102
60	103
61	108
62	109
63	110
64	111

[4, 5, 6, 7, 11, 12, 13, 14, 15, 18, 19, 20, 25, 26, 27, 28, 31, 32, 33, 34, 35, 36, 38, 39, 44, 45, 46, 47, 51, 52, 53, 54, 55, 57, 58, 59, 60, 64, 68, 70, 71, 72, 75, 76, 77, 78, 79, 83, 84, 85, 89, 90, 91, 92, 93, 95, 99, 100, 102, 103, 108, 109, 110, 111]

cp's OEIS Frontend

A213524 Numbers not representable as the sum of three octagonal numbers.

Table of values

List of values

n	a(n)
1	4
2	5
3	6
4	7
5	11
6	12
7	13
8	14
9	15
10	18
11	19
12	20
13	25
14	26
15	27
16	28
17	31
18	32
19	33
20	34
21	35
22	36
23	38
24	39
25	44
26	45
27	46
28	47
29	51
30	52
31	53
32	54
33	55
34	57
35	58
36	59
37	60
38	64
39	68
40	70
41	71
42	72
43	75
44	76
45	77
46	78
47	79
48	83
49	84
50	85
51	89
52	90
53	91
54	92
55	93
56	95
57	99
58	100
59	102
60	103
61	108
62	109
63	110
64	111

n	a(n)
1	4
2	5
3	6
4	7
5	11
6	12
7	13
8	14
9	15
10	18
11	19
12	20
13	25
14	26
15	27
16	28
17	31
18	32
19	33
20	34
21	35
22	36
23	38
24	39
25	44
26	45
27	46
28	47
29	51
30	52
31	53
32	54
33	55
34	57
35	58
36	59
37	60
38	64
39	68
40	70
41	71
42	72
43	75
44	76
45	77
46	78
47	79
48	83
49	84
50	85
51	89
52	90
53	91
54	92
55	93
56	95
57	99
58	100
59	102
60	103
61	108
62	109
63	110
64	111

n	a(n)
1	4
2	5
3	6
4	7
5	11
6	12
7	13
8	14
9	15
10	18
11	19
12	20
13	25
14	26
15	27
16	28
17	31
18	32
19	33
20	34
21	35
22	36
23	38
24	39
25	44
26	45
27	46
28	47
29	51
30	52
31	53
32	54
33	55
34	57
35	58
36	59
37	60
38	64
39	68
40	70
41	71
42	72
43	75
44	76
45	77
46	78
47	79
48	83
49	84
50	85
51	89
52	90
53	91
54	92
55	93
56	95
57	99
58	100
59	102
60	103
61	108
62	109
63	110
64	111