A002859 - cp's OEIS frontend

A002859 a(1) = 1, a(2) = 3; for n >= 3, a(n) is smallest number that is uniquely of the form a(j) + a(k) with 1 <= j < k < n.

n	a(n)
1	1
2	3
3	4
4	5
5	6
6	8
7	10
8	12
9	17
10	21
11	23
12	28
13	32
14	34
15	39
16	43
17	48
18	52
19	54
20	59
21	63
22	68
23	72
24	74
25	79
26	83
27	98
28	99
29	101
30	110
31	114
32	121
33	125
34	132
35	136
36	139
37	143
38	145
39	152
40	161
41	165
42	172
43	176
44	187
45	192
46	196
47	201
48	205
49	212
50	216
51	223
52	227
53	232
54	234
55	236
56	243
57	247
58	252
59	256
60	258

[1, 3, 4, 5, 6, 8, 10, 12, 17, 21, 23, 28, 32, 34, 39, 43, 48, 52, 54, 59, 63, 68, 72, 74, 79, 83, 98, 99, 101, 110, 114, 121, 125, 132, 136, 139, 143, 145, 152, 161, 165, 172, 176, 187, 192, 196, 201, 205, 212, 216, 223, 227, 232, 234, 236, 243, 247, 252, 256, 258]

cp's OEIS Frontend

A002859 a(1) = 1, a(2) = 3; for n >= 3, a(n) is smallest number that is uniquely of the form a(j) + a(k) with 1 <= j < k < n.

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	5
5	6
6	8
7	10
8	12
9	17
10	21
11	23
12	28
13	32
14	34
15	39
16	43
17	48
18	52
19	54
20	59
21	63
22	68
23	72
24	74
25	79
26	83
27	98
28	99
29	101
30	110
31	114
32	121
33	125
34	132
35	136
36	139
37	143
38	145
39	152
40	161
41	165
42	172
43	176
44	187
45	192
46	196
47	201
48	205
49	212
50	216
51	223
52	227
53	232
54	234
55	236
56	243
57	247
58	252
59	256
60	258

n	a(n)
1	1
2	3
3	4
4	5
5	6
6	8
7	10
8	12
9	17
10	21
11	23
12	28
13	32
14	34
15	39
16	43
17	48
18	52
19	54
20	59
21	63
22	68
23	72
24	74
25	79
26	83
27	98
28	99
29	101
30	110
31	114
32	121
33	125
34	132
35	136
36	139
37	143
38	145
39	152
40	161
41	165
42	172
43	176
44	187
45	192
46	196
47	201
48	205
49	212
50	216
51	223
52	227
53	232
54	234
55	236
56	243
57	247
58	252
59	256
60	258

n	a(n)
1	1
2	3
3	4
4	5
5	6
6	8
7	10
8	12
9	17
10	21
11	23
12	28
13	32
14	34
15	39
16	43
17	48
18	52
19	54
20	59
21	63
22	68
23	72
24	74
25	79
26	83
27	98
28	99
29	101
30	110
31	114
32	121
33	125
34	132
35	136
36	139
37	143
38	145
39	152
40	161
41	165
42	172
43	176
44	187
45	192
46	196
47	201
48	205
49	212
50	216
51	223
52	227
53	232
54	234
55	236
56	243
57	247
58	252
59	256
60	258