A049821 - cp's OEIS frontend

A049821 a(n) = 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	3
4	4
5	5
6	6
7	8
8	9
9	12
10	12
11	14
12	15
13	15
14	17
15	18
16	18
17	20
18	20
19	22
20	23
21	23
22	25
23	25
24	27
25	28
26	28
27	35
28	28
29	29
30	35
31	33
32	38
33	35
34	41
35	37
36	37
37	39
38	41
39	46
40	48
41	43
42	51
43	45
44	53
45	48
46	48
47	50
48	50
49	58
50	52
51	60
52	54
53	56
54	62
55	56
56	65
57	59
58	61
59	61
60	63
61	70
62	64
63	66
64	71
65	66
66	73
67	69
68	77
69	71
70	79
71	73
72	83
73	74
74	76
75	78

[3, 4, 5, 6, 8, 9, 12, 12, 14, 15, 15, 17, 18, 18, 20, 20, 22, 23, 23, 25, 25, 27, 28, 28, 35, 28, 29, 35, 33, 38, 35, 41, 37, 37, 39, 41, 46, 48, 43, 51, 45, 53, 48, 48, 50, 50, 58, 52, 60, 54, 56, 62, 56, 65, 59, 61, 61, 63, 70, 64, 66, 71, 66, 73, 69, 77, 71, 79, 73, 83, 74, 76, 78]

cp's OEIS Frontend

A049821 a(n) = 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	3
4	4
5	5
6	6
7	8
8	9
9	12
10	12
11	14
12	15
13	15
14	17
15	18
16	18
17	20
18	20
19	22
20	23
21	23
22	25
23	25
24	27
25	28
26	28
27	35
28	28
29	29
30	35
31	33
32	38
33	35
34	41
35	37
36	37
37	39
38	41
39	46
40	48
41	43
42	51
43	45
44	53
45	48
46	48
47	50
48	50
49	58
50	52
51	60
52	54
53	56
54	62
55	56
56	65
57	59
58	61
59	61
60	63
61	70
62	64
63	66
64	71
65	66
66	73
67	69
68	77
69	71
70	79
71	73
72	83
73	74
74	76
75	78

n	a(n)
3	3
4	4
5	5
6	6
7	8
8	9
9	12
10	12
11	14
12	15
13	15
14	17
15	18
16	18
17	20
18	20
19	22
20	23
21	23
22	25
23	25
24	27
25	28
26	28
27	35
28	28
29	29
30	35
31	33
32	38
33	35
34	41
35	37
36	37
37	39
38	41
39	46
40	48
41	43
42	51
43	45
44	53
45	48
46	48
47	50
48	50
49	58
50	52
51	60
52	54
53	56
54	62
55	56
56	65
57	59
58	61
59	61
60	63
61	70
62	64
63	66
64	71
65	66
66	73
67	69
68	77
69	71
70	79
71	73
72	83
73	74
74	76
75	78

n	a(n)
3	3
4	4
5	5
6	6
7	8
8	9
9	12
10	12
11	14
12	15
13	15
14	17
15	18
16	18
17	20
18	20
19	22
20	23
21	23
22	25
23	25
24	27
25	28
26	28
27	35
28	28
29	29
30	35
31	33
32	38
33	35
34	41
35	37
36	37
37	39
38	41
39	46
40	48
41	43
42	51
43	45
44	53
45	48
46	48
47	50
48	50
49	58
50	52
51	60
52	54
53	56
54	62
55	56
56	65
57	59
58	61
59	61
60	63
61	70
62	64
63	66
64	71
65	66
66	73
67	69
68	77
69	71
70	79
71	73
72	83
73	74
74	76
75	78