A007300 - cp's OEIS frontend

A007300 a(1)=2, a(2)=5; for n >= 3, a(n) is smallest number which is uniquely of the form a(j) + a(k) with 1 <= j < k < n.

n	a(n)
1	2
2	5
3	7
4	9
5	11
6	12
7	13
8	15
9	19
10	23
11	27
12	29
13	35
14	37
15	41
16	43
17	45
18	49
19	51
20	55
21	61
22	67
23	69
24	71
25	79
26	83
27	85
28	87
29	89
30	95
31	99
32	107
33	109
34	119
35	131
36	133
37	135
38	137
39	139
40	141
41	145
42	149
43	153
44	155
45	161
46	163
47	167
48	169
49	171
50	175
51	177
52	181
53	187
54	193
55	195
56	197
57	205
58	209
59	211
60	213
61	215

[2, 5, 7, 9, 11, 12, 13, 15, 19, 23, 27, 29, 35, 37, 41, 43, 45, 49, 51, 55, 61, 67, 69, 71, 79, 83, 85, 87, 89, 95, 99, 107, 109, 119, 131, 133, 135, 137, 139, 141, 145, 149, 153, 155, 161, 163, 167, 169, 171, 175, 177, 181, 187, 193, 195, 197, 205, 209, 211, 213, 215]

cp's OEIS Frontend

A007300 a(1)=2, a(2)=5; for n >= 3, a(n) is smallest number which is uniquely of the form a(j) + a(k) with 1 <= j < k < n.

Table of values

List of values

n	a(n)
1	2
2	5
3	7
4	9
5	11
6	12
7	13
8	15
9	19
10	23
11	27
12	29
13	35
14	37
15	41
16	43
17	45
18	49
19	51
20	55
21	61
22	67
23	69
24	71
25	79
26	83
27	85
28	87
29	89
30	95
31	99
32	107
33	109
34	119
35	131
36	133
37	135
38	137
39	139
40	141
41	145
42	149
43	153
44	155
45	161
46	163
47	167
48	169
49	171
50	175
51	177
52	181
53	187
54	193
55	195
56	197
57	205
58	209
59	211
60	213
61	215

n	a(n)
1	2
2	5
3	7
4	9
5	11
6	12
7	13
8	15
9	19
10	23
11	27
12	29
13	35
14	37
15	41
16	43
17	45
18	49
19	51
20	55
21	61
22	67
23	69
24	71
25	79
26	83
27	85
28	87
29	89
30	95
31	99
32	107
33	109
34	119
35	131
36	133
37	135
38	137
39	139
40	141
41	145
42	149
43	153
44	155
45	161
46	163
47	167
48	169
49	171
50	175
51	177
52	181
53	187
54	193
55	195
56	197
57	205
58	209
59	211
60	213
61	215

n	a(n)
1	2
2	5
3	7
4	9
5	11
6	12
7	13
8	15
9	19
10	23
11	27
12	29
13	35
14	37
15	41
16	43
17	45
18	49
19	51
20	55
21	61
22	67
23	69
24	71
25	79
26	83
27	85
28	87
29	89
30	95
31	99
32	107
33	109
34	119
35	131
36	133
37	135
38	137
39	139
40	141
41	145
42	149
43	153
44	155
45	161
46	163
47	167
48	169
49	171
50	175
51	177
52	181
53	187
54	193
55	195
56	197
57	205
58	209
59	211
60	213
61	215