A187126 - cp's OEIS frontend

A187126 Triangular numbers k*(k+1)/2 mod 1000, sorted and uniqued.

n	a(n)
1	0
2	1
3	3
4	5
5	6
6	10
7	11
8	15
9	16
10	20
11	21
12	25
13	26
14	28
15	30
16	31
17	35
18	36
19	40
20	41
21	45
22	46
23	50
24	51
25	55
26	56
27	60
28	61
29	65
30	66
31	70
32	71
33	75
34	76
35	78
36	80
37	81
38	85
39	86
40	90
41	91
42	95
43	96
44	100
45	101
46	105
47	106
48	110
49	111
50	115
51	116
52	120
53	121
54	125
55	126
56	128
57	130
58	131
59	135
60	136
61	140

[0, 1, 3, 5, 6, 10, 11, 15, 16, 20, 21, 25, 26, 28, 30, 31, 35, 36, 40, 41, 45, 46, 50, 51, 55, 56, 60, 61, 65, 66, 70, 71, 75, 76, 78, 80, 81, 85, 86, 90, 91, 95, 96, 100, 101, 105, 106, 110, 111, 115, 116, 120, 121, 125, 126, 128, 130, 131, 135, 136, 140]

cp's OEIS Frontend

A187126 Triangular numbers k*(k+1)/2 mod 1000, sorted and uniqued.

Table of values

List of values

n	a(n)
1	0
2	1
3	3
4	5
5	6
6	10
7	11
8	15
9	16
10	20
11	21
12	25
13	26
14	28
15	30
16	31
17	35
18	36
19	40
20	41
21	45
22	46
23	50
24	51
25	55
26	56
27	60
28	61
29	65
30	66
31	70
32	71
33	75
34	76
35	78
36	80
37	81
38	85
39	86
40	90
41	91
42	95
43	96
44	100
45	101
46	105
47	106
48	110
49	111
50	115
51	116
52	120
53	121
54	125
55	126
56	128
57	130
58	131
59	135
60	136
61	140

n	a(n)
1	0
2	1
3	3
4	5
5	6
6	10
7	11
8	15
9	16
10	20
11	21
12	25
13	26
14	28
15	30
16	31
17	35
18	36
19	40
20	41
21	45
22	46
23	50
24	51
25	55
26	56
27	60
28	61
29	65
30	66
31	70
32	71
33	75
34	76
35	78
36	80
37	81
38	85
39	86
40	90
41	91
42	95
43	96
44	100
45	101
46	105
47	106
48	110
49	111
50	115
51	116
52	120
53	121
54	125
55	126
56	128
57	130
58	131
59	135
60	136
61	140

n	a(n)
1	0
2	1
3	3
4	5
5	6
6	10
7	11
8	15
9	16
10	20
11	21
12	25
13	26
14	28
15	30
16	31
17	35
18	36
19	40
20	41
21	45
22	46
23	50
24	51
25	55
26	56
27	60
28	61
29	65
30	66
31	70
32	71
33	75
34	76
35	78
36	80
37	81
38	85
39	86
40	90
41	91
42	95
43	96
44	100
45	101
46	105
47	106
48	110
49	111
50	115
51	116
52	120
53	121
54	125
55	126
56	128
57	130
58	131
59	135
60	136
61	140