A309275 - cp's OEIS frontend

A309275 a(n) is the smallest divisor not yet in the sequence of 3T(n)= 3n(n-1)/2, where T(n) are the triangular numbers; n => 1.

n	a(n)
1	1
2	3
3	9
4	2
5	5
6	15
7	7
8	4
9	6
10	27
11	11
12	18
13	13
14	21
15	35
16	8
17	12
18	17
19	19
20	10
21	14
22	33
23	23
24	36
25	20
26	25
27	39
28	42
29	29
30	45
31	31
32	16
33	22
34	51
35	85
36	30
37	37
38	57
39	117
40	26
41	41
42	63
43	43
44	66
45	54
46	69
47	47
48	24
49	28
50	49
51	75
52	34
53	53
54	81
55	55
56	44
57	38
58	87
59	59
60	90
61	61
62	93
63	189
64	32
65	40
66	65
67	67
68	102

[1, 3, 9, 2, 5, 15, 7, 4, 6, 27, 11, 18, 13, 21, 35, 8, 12, 17, 19, 10, 14, 33, 23, 36, 20, 25, 39, 42, 29, 45, 31, 16, 22, 51, 85, 30, 37, 57, 117, 26, 41, 63, 43, 66, 54, 69, 47, 24, 28, 49, 75, 34, 53, 81, 55, 44, 38, 87, 59, 90, 61, 93, 189, 32, 40, 65, 67, 102]

cp's OEIS Frontend

A309275 a(n) is the smallest divisor not yet in the sequence of 3T(n)= 3n(n-1)/2, where T(n) are the triangular numbers; n => 1.

Table of values

List of values

n	a(n)
1	1
2	3
3	9
4	2
5	5
6	15
7	7
8	4
9	6
10	27
11	11
12	18
13	13
14	21
15	35
16	8
17	12
18	17
19	19
20	10
21	14
22	33
23	23
24	36
25	20
26	25
27	39
28	42
29	29
30	45
31	31
32	16
33	22
34	51
35	85
36	30
37	37
38	57
39	117
40	26
41	41
42	63
43	43
44	66
45	54
46	69
47	47
48	24
49	28
50	49
51	75
52	34
53	53
54	81
55	55
56	44
57	38
58	87
59	59
60	90
61	61
62	93
63	189
64	32
65	40
66	65
67	67
68	102

n	a(n)
1	1
2	3
3	9
4	2
5	5
6	15
7	7
8	4
9	6
10	27
11	11
12	18
13	13
14	21
15	35
16	8
17	12
18	17
19	19
20	10
21	14
22	33
23	23
24	36
25	20
26	25
27	39
28	42
29	29
30	45
31	31
32	16
33	22
34	51
35	85
36	30
37	37
38	57
39	117
40	26
41	41
42	63
43	43
44	66
45	54
46	69
47	47
48	24
49	28
50	49
51	75
52	34
53	53
54	81
55	55
56	44
57	38
58	87
59	59
60	90
61	61
62	93
63	189
64	32
65	40
66	65
67	67
68	102

cp's OEIS Frontend

A309275 a(n) is the smallest divisor not yet in the sequence of 3*T(n)= 3*n(n-1)/2, where T(n) are the triangular numbers; n => 1.

Table of values

List of values

A309275 a(n) is the smallest divisor not yet in the sequence of 3T(n)= 3n(n-1)/2, where T(n) are the triangular numbers; n => 1.

n	a(n)
1	1
2	3
3	9
4	2
5	5
6	15
7	7
8	4
9	6
10	27
11	11
12	18
13	13
14	21
15	35
16	8
17	12
18	17
19	19
20	10
21	14
22	33
23	23
24	36
25	20
26	25
27	39
28	42
29	29
30	45
31	31
32	16
33	22
34	51
35	85
36	30
37	37
38	57
39	117
40	26
41	41
42	63
43	43
44	66
45	54
46	69
47	47
48	24
49	28
50	49
51	75
52	34
53	53
54	81
55	55
56	44
57	38
58	87
59	59
60	90
61	61
62	93
63	189
64	32
65	40
66	65
67	67
68	102