A094550 - cp's OEIS frontend

A094550 Numbers n such that there are integers a < b with a+(a+1)+...+(n-1) = (n+1)+(n+2)+...+b.

n	a(n)
1	4
2	6
3	9
4	11
5	14
6	15
7	16
8	17
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	29
17	30
18	31
19	32
20	34
21	35
22	36
23	38
24	39
25	40
26	41
27	43
28	44
29	46
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	56
38	57
39	59
40	61
41	64
42	66
43	68
44	69
45	70
46	71
47	72
48	74
49	76
50	77
51	79
52	81
53	82
54	83
55	84
56	86
57	87
58	89
59	91
60	93
61	94
62	95
63	96
64	97
65	98
66	99
67	100
68	101
69	104

[4, 6, 9, 11, 14, 15, 16, 17, 19, 21, 22, 23, 24, 25, 26, 29, 30, 31, 32, 34, 35, 36, 38, 39, 40, 41, 43, 44, 46, 48, 49, 50, 51, 52, 53, 54, 56, 57, 59, 61, 64, 66, 68, 69, 70, 71, 72, 74, 76, 77, 79, 81, 82, 83, 84, 86, 87, 89, 91, 93, 94, 95, 96, 97, 98, 99, 100, 101, 104]

cp's OEIS Frontend

A094550 Numbers n such that there are integers a < b with a+(a+1)+...+(n-1) = (n+1)+(n+2)+...+b.

Table of values

List of values

n	a(n)
1	4
2	6
3	9
4	11
5	14
6	15
7	16
8	17
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	29
17	30
18	31
19	32
20	34
21	35
22	36
23	38
24	39
25	40
26	41
27	43
28	44
29	46
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	56
38	57
39	59
40	61
41	64
42	66
43	68
44	69
45	70
46	71
47	72
48	74
49	76
50	77
51	79
52	81
53	82
54	83
55	84
56	86
57	87
58	89
59	91
60	93
61	94
62	95
63	96
64	97
65	98
66	99
67	100
68	101
69	104

n	a(n)
1	4
2	6
3	9
4	11
5	14
6	15
7	16
8	17
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	29
17	30
18	31
19	32
20	34
21	35
22	36
23	38
24	39
25	40
26	41
27	43
28	44
29	46
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	56
38	57
39	59
40	61
41	64
42	66
43	68
44	69
45	70
46	71
47	72
48	74
49	76
50	77
51	79
52	81
53	82
54	83
55	84
56	86
57	87
58	89
59	91
60	93
61	94
62	95
63	96
64	97
65	98
66	99
67	100
68	101
69	104

n	a(n)
1	4
2	6
3	9
4	11
5	14
6	15
7	16
8	17
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	29
17	30
18	31
19	32
20	34
21	35
22	36
23	38
24	39
25	40
26	41
27	43
28	44
29	46
30	48
31	49
32	50
33	51
34	52
35	53
36	54
37	56
38	57
39	59
40	61
41	64
42	66
43	68
44	69
45	70
46	71
47	72
48	74
49	76
50	77
51	79
52	81
53	82
54	83
55	84
56	86
57	87
58	89
59	91
60	93
61	94
62	95
63	96
64	97
65	98
66	99
67	100
68	101
69	104