A003667 - cp's OEIS frontend

A003667 a(n) is smallest number which is uniquely of the form a(j) + a(k) with 1 <= j < k < n and a(1) = 1, a(2) = 5.

n	a(n)
1	1
2	5
3	6
4	7
5	8
6	9
7	10
8	12
9	20
10	22
11	23
12	24
13	26
14	38
15	39
16	40
17	41
18	52
19	57
20	69
21	70
22	71
23	82
24	87
25	98
26	102
27	113
28	119
29	129
30	130
31	133
32	144
33	160
34	161
35	162
36	163
37	175
38	196
39	205
40	208
41	209
42	222
43	223
44	224
45	226
46	237
47	253
48	254
49	255
50	256
51	268
52	269
53	270
54	271
55	272
56	284
57	285
58	286
59	303
60	318

[1, 5, 6, 7, 8, 9, 10, 12, 20, 22, 23, 24, 26, 38, 39, 40, 41, 52, 57, 69, 70, 71, 82, 87, 98, 102, 113, 119, 129, 130, 133, 144, 160, 161, 162, 163, 175, 196, 205, 208, 209, 222, 223, 224, 226, 237, 253, 254, 255, 256, 268, 269, 270, 271, 272, 284, 285, 286, 303, 318]

cp's OEIS Frontend

A003667 a(n) is smallest number which is uniquely of the form a(j) + a(k) with 1 <= j < k < n and a(1) = 1, a(2) = 5.

Table of values

List of values

n	a(n)
1	1
2	5
3	6
4	7
5	8
6	9
7	10
8	12
9	20
10	22
11	23
12	24
13	26
14	38
15	39
16	40
17	41
18	52
19	57
20	69
21	70
22	71
23	82
24	87
25	98
26	102
27	113
28	119
29	129
30	130
31	133
32	144
33	160
34	161
35	162
36	163
37	175
38	196
39	205
40	208
41	209
42	222
43	223
44	224
45	226
46	237
47	253
48	254
49	255
50	256
51	268
52	269
53	270
54	271
55	272
56	284
57	285
58	286
59	303
60	318

n	a(n)
1	1
2	5
3	6
4	7
5	8
6	9
7	10
8	12
9	20
10	22
11	23
12	24
13	26
14	38
15	39
16	40
17	41
18	52
19	57
20	69
21	70
22	71
23	82
24	87
25	98
26	102
27	113
28	119
29	129
30	130
31	133
32	144
33	160
34	161
35	162
36	163
37	175
38	196
39	205
40	208
41	209
42	222
43	223
44	224
45	226
46	237
47	253
48	254
49	255
50	256
51	268
52	269
53	270
54	271
55	272
56	284
57	285
58	286
59	303
60	318

n	a(n)
1	1
2	5
3	6
4	7
5	8
6	9
7	10
8	12
9	20
10	22
11	23
12	24
13	26
14	38
15	39
16	40
17	41
18	52
19	57
20	69
21	70
22	71
23	82
24	87
25	98
26	102
27	113
28	119
29	129
30	130
31	133
32	144
33	160
34	161
35	162
36	163
37	175
38	196
39	205
40	208
41	209
42	222
43	223
44	224
45	226
46	237
47	253
48	254
49	255
50	256
51	268
52	269
53	270
54	271
55	272
56	284
57	285
58	286
59	303
60	318