A067197 - cp's OEIS frontend

A067197 Numbers k such that k*(k+1)/2 is not squarefree.

n	a(n)
1	7
2	8
3	9
4	15
5	16
6	17
7	18
8	23
9	24
10	25
11	26
12	27
13	31
14	32
15	35
16	36
17	39
18	40
19	44
20	45
21	47
22	48
23	49
24	50
25	53
26	54
27	55
28	56
29	62
30	63
31	64
32	71
33	72
34	74
35	75
36	79
37	80
38	81
39	87
40	88
41	89
42	90
43	95
44	96
45	97
46	98
47	99
48	100
49	103
50	104
51	107
52	108
53	111
54	112
55	116
56	117
57	119
58	120
59	121
60	124
61	125
62	126
63	127
64	128

[7, 8, 9, 15, 16, 17, 18, 23, 24, 25, 26, 27, 31, 32, 35, 36, 39, 40, 44, 45, 47, 48, 49, 50, 53, 54, 55, 56, 62, 63, 64, 71, 72, 74, 75, 79, 80, 81, 87, 88, 89, 90, 95, 96, 97, 98, 99, 100, 103, 104, 107, 108, 111, 112, 116, 117, 119, 120, 121, 124, 125, 126, 127, 128]

cp's OEIS Frontend

A067197 Numbers k such that k*(k+1)/2 is not squarefree.

Table of values

List of values

n	a(n)
1	7
2	8
3	9
4	15
5	16
6	17
7	18
8	23
9	24
10	25
11	26
12	27
13	31
14	32
15	35
16	36
17	39
18	40
19	44
20	45
21	47
22	48
23	49
24	50
25	53
26	54
27	55
28	56
29	62
30	63
31	64
32	71
33	72
34	74
35	75
36	79
37	80
38	81
39	87
40	88
41	89
42	90
43	95
44	96
45	97
46	98
47	99
48	100
49	103
50	104
51	107
52	108
53	111
54	112
55	116
56	117
57	119
58	120
59	121
60	124
61	125
62	126
63	127
64	128

n	a(n)
1	7
2	8
3	9
4	15
5	16
6	17
7	18
8	23
9	24
10	25
11	26
12	27
13	31
14	32
15	35
16	36
17	39
18	40
19	44
20	45
21	47
22	48
23	49
24	50
25	53
26	54
27	55
28	56
29	62
30	63
31	64
32	71
33	72
34	74
35	75
36	79
37	80
38	81
39	87
40	88
41	89
42	90
43	95
44	96
45	97
46	98
47	99
48	100
49	103
50	104
51	107
52	108
53	111
54	112
55	116
56	117
57	119
58	120
59	121
60	124
61	125
62	126
63	127
64	128

n	a(n)
1	7
2	8
3	9
4	15
5	16
6	17
7	18
8	23
9	24
10	25
11	26
12	27
13	31
14	32
15	35
16	36
17	39
18	40
19	44
20	45
21	47
22	48
23	49
24	50
25	53
26	54
27	55
28	56
29	62
30	63
31	64
32	71
33	72
34	74
35	75
36	79
37	80
38	81
39	87
40	88
41	89
42	90
43	95
44	96
45	97
46	98
47	99
48	100
49	103
50	104
51	107
52	108
53	111
54	112
55	116
56	117
57	119
58	120
59	121
60	124
61	125
62	126
63	127
64	128