A101274 - cp's OEIS frontend

A101274 a(1)=1; for n>1, a(n) is the smallest positive integer such that the set of all sums of adjacent elements up to and including a(n) contains no number more than once.

n	a(n)
1	1
2	2
3	4
4	5
5	8
6	10
7	14
8	21
9	15
10	16
11	26
12	25
13	34
14	22
15	48
16	38
17	71
18	40
19	74
20	90
21	28
22	69
23	113
24	47
25	94
26	54
27	46
28	143
29	153
30	83
31	128
32	49
33	249
34	75
35	133
36	225
37	125
38	131
39	270
40	145
41	230
42	199
43	237
44	206
45	201
46	299
47	136
48	346
49	72
50	272
51	120
52	55
53	453
54	247
55	376
56	427
57	124
58	535
59	87
60	242
61	431
62	283
63	227
64	212
65	940
66	318
67	387
68	311
69	391
70	325

[1, 2, 4, 5, 8, 10, 14, 21, 15, 16, 26, 25, 34, 22, 48, 38, 71, 40, 74, 90, 28, 69, 113, 47, 94, 54, 46, 143, 153, 83, 128, 49, 249, 75, 133, 225, 125, 131, 270, 145, 230, 199, 237, 206, 201, 299, 136, 346, 72, 272, 120, 55, 453, 247, 376, 427, 124, 535, 87, 242, 431, 283, 227, 212, 940, 318, 387, 311, 391, 325]

cp's OEIS Frontend

A101274 a(1)=1; for n>1, a(n) is the smallest positive integer such that the set of all sums of adjacent elements up to and including a(n) contains no number more than once.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	5
5	8
6	10
7	14
8	21
9	15
10	16
11	26
12	25
13	34
14	22
15	48
16	38
17	71
18	40
19	74
20	90
21	28
22	69
23	113
24	47
25	94
26	54
27	46
28	143
29	153
30	83
31	128
32	49
33	249
34	75
35	133
36	225
37	125
38	131
39	270
40	145
41	230
42	199
43	237
44	206
45	201
46	299
47	136
48	346
49	72
50	272
51	120
52	55
53	453
54	247
55	376
56	427
57	124
58	535
59	87
60	242
61	431
62	283
63	227
64	212
65	940
66	318
67	387
68	311
69	391
70	325

n	a(n)
1	1
2	2
3	4
4	5
5	8
6	10
7	14
8	21
9	15
10	16
11	26
12	25
13	34
14	22
15	48
16	38
17	71
18	40
19	74
20	90
21	28
22	69
23	113
24	47
25	94
26	54
27	46
28	143
29	153
30	83
31	128
32	49
33	249
34	75
35	133
36	225
37	125
38	131
39	270
40	145
41	230
42	199
43	237
44	206
45	201
46	299
47	136
48	346
49	72
50	272
51	120
52	55
53	453
54	247
55	376
56	427
57	124
58	535
59	87
60	242
61	431
62	283
63	227
64	212
65	940
66	318
67	387
68	311
69	391
70	325

n	a(n)
1	1
2	2
3	4
4	5
5	8
6	10
7	14
8	21
9	15
10	16
11	26
12	25
13	34
14	22
15	48
16	38
17	71
18	40
19	74
20	90
21	28
22	69
23	113
24	47
25	94
26	54
27	46
28	143
29	153
30	83
31	128
32	49
33	249
34	75
35	133
36	225
37	125
38	131
39	270
40	145
41	230
42	199
43	237
44	206
45	201
46	299
47	136
48	346
49	72
50	272
51	120
52	55
53	453
54	247
55	376
56	427
57	124
58	535
59	87
60	242
61	431
62	283
63	227
64	212
65	940
66	318
67	387
68	311
69	391
70	325