A183527 - cp's OEIS frontend

A183527 An Ulam-type sequence: a(n) = n if n<=4; for n>4, a(n) = least number > a(n-1) which is a unique sum of 4 distinct earlier terms.

n	a(n)
1	1
2	2
3	3
4	4
5	10
6	16
7	17
8	18
9	19
10	22
11	64
12	65
13	66
14	68
15	69
16	128
17	132
18	188
19	190
20	191
21	194
22	252
23	253
24	255
25	313
26	314
27	318
28	374
29	376
30	377
31	436
32	441
33	496
34	497
35	499
36	500
37	502
38	560
39	561
40	563
41	621
42	622
43	626
44	682
45	684
46	685
47	687
48	745
49	746
50	805
51	811

[1, 2, 3, 4, 10, 16, 17, 18, 19, 22, 64, 65, 66, 68, 69, 128, 132, 188, 190, 191, 194, 252, 253, 255, 313, 314, 318, 374, 376, 377, 436, 441, 496, 497, 499, 500, 502, 560, 561, 563, 621, 622, 626, 682, 684, 685, 687, 745, 746, 805, 811]

cp's OEIS Frontend

A183527 An Ulam-type sequence: a(n) = n if n<=4; for n>4, a(n) = least number > a(n-1) which is a unique sum of 4 distinct earlier terms.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	10
6	16
7	17
8	18
9	19
10	22
11	64
12	65
13	66
14	68
15	69
16	128
17	132
18	188
19	190
20	191
21	194
22	252
23	253
24	255
25	313
26	314
27	318
28	374
29	376
30	377
31	436
32	441
33	496
34	497
35	499
36	500
37	502
38	560
39	561
40	563
41	621
42	622
43	626
44	682
45	684
46	685
47	687
48	745
49	746
50	805
51	811

n	a(n)
1	1
2	2
3	3
4	4
5	10
6	16
7	17
8	18
9	19
10	22
11	64
12	65
13	66
14	68
15	69
16	128
17	132
18	188
19	190
20	191
21	194
22	252
23	253
24	255
25	313
26	314
27	318
28	374
29	376
30	377
31	436
32	441
33	496
34	497
35	499
36	500
37	502
38	560
39	561
40	563
41	621
42	622
43	626
44	682
45	684
46	685
47	687
48	745
49	746
50	805
51	811

n	a(n)
1	1
2	2
3	3
4	4
5	10
6	16
7	17
8	18
9	19
10	22
11	64
12	65
13	66
14	68
15	69
16	128
17	132
18	188
19	190
20	191
21	194
22	252
23	253
24	255
25	313
26	314
27	318
28	374
29	376
30	377
31	436
32	441
33	496
34	497
35	499
36	500
37	502
38	560
39	561
40	563
41	621
42	622
43	626
44	682
45	684
46	685
47	687
48	745
49	746
50	805
51	811