A049877 - cp's OEIS frontend

A049877 a(n) = max(j,k), where u(n) = u(j) + u(k) is the unique sum of Ulam numbers described in A002859 (with 1 <= j < k < n).

n	a(n)
3	2
4	3
5	4
6	4
7	5
8	6
9	8
10	9
11	9
12	11
13	12
14	12
15	14
16	15
17	16
18	17
19	17
20	19
21	20
22	21
23	22
24	22
25	24
26	25
27	20
28	27
29	27
30	27
31	30
32	27
33	32
34	27
35	34
36	35
37	36
38	36
39	27
40	27
41	40
42	27
43	42
44	36
45	44
46	45
47	46
48	47
49	31
50	49
51	33
52	51
53	52
54	35
55	53
56	38
57	56
58	57
59	58
60	58
61	43
62	61
63	62
64	44
65	63
66	46
67	66
68	50
69	68
70	52
71	70
72	47
73	72
74	73
75	73
76	60

[2, 3, 4, 4, 5, 6, 8, 9, 9, 11, 12, 12, 14, 15, 16, 17, 17, 19, 20, 21, 22, 22, 24, 25, 20, 27, 27, 27, 30, 27, 32, 27, 34, 35, 36, 36, 27, 27, 40, 27, 42, 36, 44, 45, 46, 47, 31, 49, 33, 51, 52, 35, 53, 38, 56, 57, 58, 58, 43, 61, 62, 44, 63, 46, 66, 50, 68, 52, 70, 47, 72, 73, 73, 60]

cp's OEIS Frontend

A049877 a(n) = max(j,k), where u(n) = u(j) + u(k) is the unique sum of Ulam numbers described in A002859 (with 1 <= j < k < n).

Table of values

List of values

n	a(n)
3	2
4	3
5	4
6	4
7	5
8	6
9	8
10	9
11	9
12	11
13	12
14	12
15	14
16	15
17	16
18	17
19	17
20	19
21	20
22	21
23	22
24	22
25	24
26	25
27	20
28	27
29	27
30	27
31	30
32	27
33	32
34	27
35	34
36	35
37	36
38	36
39	27
40	27
41	40
42	27
43	42
44	36
45	44
46	45
47	46
48	47
49	31
50	49
51	33
52	51
53	52
54	35
55	53
56	38
57	56
58	57
59	58
60	58
61	43
62	61
63	62
64	44
65	63
66	46
67	66
68	50
69	68
70	52
71	70
72	47
73	72
74	73
75	73
76	60

n	a(n)
3	2
4	3
5	4
6	4
7	5
8	6
9	8
10	9
11	9
12	11
13	12
14	12
15	14
16	15
17	16
18	17
19	17
20	19
21	20
22	21
23	22
24	22
25	24
26	25
27	20
28	27
29	27
30	27
31	30
32	27
33	32
34	27
35	34
36	35
37	36
38	36
39	27
40	27
41	40
42	27
43	42
44	36
45	44
46	45
47	46
48	47
49	31
50	49
51	33
52	51
53	52
54	35
55	53
56	38
57	56
58	57
59	58
60	58
61	43
62	61
63	62
64	44
65	63
66	46
67	66
68	50
69	68
70	52
71	70
72	47
73	72
74	73
75	73
76	60

n	a(n)
3	2
4	3
5	4
6	4
7	5
8	6
9	8
10	9
11	9
12	11
13	12
14	12
15	14
16	15
17	16
18	17
19	17
20	19
21	20
22	21
23	22
24	22
25	24
26	25
27	20
28	27
29	27
30	27
31	30
32	27
33	32
34	27
35	34
36	35
37	36
38	36
39	27
40	27
41	40
42	27
43	42
44	36
45	44
46	45
47	46
48	47
49	31
50	49
51	33
52	51
53	52
54	35
55	53
56	38
57	56
58	57
59	58
60	58
61	43
62	61
63	62
64	44
65	63
66	46
67	66
68	50
69	68
70	52
71	70
72	47
73	72
74	73
75	73
76	60