A371061 - cp's OEIS frontend

A371061 a(1)=1, a(2)=2; for n > 2, a(n) is the sum of the largest proper divisor of each of the previous two terms, except that the term itself is used if it has no proper divisors > 1.

n	a(n)
1	1
2	2
3	3
4	5
5	8
6	9
7	7
8	10
9	12
10	11
11	17
12	28
13	31
14	45
15	46
16	38
17	42
18	40
19	41
20	61
21	102
22	112
23	107
24	163
25	270
26	298
27	284
28	291
29	239
30	336
31	407
32	205
33	78
34	80
35	79
36	119
37	96
38	65
39	61
40	74
41	98
42	86
43	92
44	89
45	135
46	134
47	112
48	123
49	97
50	138
51	166
52	152
53	159
54	129
55	96
56	91
57	61
58	74
59	98

[1, 2, 3, 5, 8, 9, 7, 10, 12, 11, 17, 28, 31, 45, 46, 38, 42, 40, 41, 61, 102, 112, 107, 163, 270, 298, 284, 291, 239, 336, 407, 205, 78, 80, 79, 119, 96, 65, 61, 74, 98, 86, 92, 89, 135, 134, 112, 123, 97, 138, 166, 152, 159, 129, 96, 91, 61, 74, 98]

cp's OEIS Frontend

A371061 a(1)=1, a(2)=2; for n > 2, a(n) is the sum of the largest proper divisor of each of the previous two terms, except that the term itself is used if it has no proper divisors > 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	8
6	9
7	7
8	10
9	12
10	11
11	17
12	28
13	31
14	45
15	46
16	38
17	42
18	40
19	41
20	61
21	102
22	112
23	107
24	163
25	270
26	298
27	284
28	291
29	239
30	336
31	407
32	205
33	78
34	80
35	79
36	119
37	96
38	65
39	61
40	74
41	98
42	86
43	92
44	89
45	135
46	134
47	112
48	123
49	97
50	138
51	166
52	152
53	159
54	129
55	96
56	91
57	61
58	74
59	98

n	a(n)
1	1
2	2
3	3
4	5
5	8
6	9
7	7
8	10
9	12
10	11
11	17
12	28
13	31
14	45
15	46
16	38
17	42
18	40
19	41
20	61
21	102
22	112
23	107
24	163
25	270
26	298
27	284
28	291
29	239
30	336
31	407
32	205
33	78
34	80
35	79
36	119
37	96
38	65
39	61
40	74
41	98
42	86
43	92
44	89
45	135
46	134
47	112
48	123
49	97
50	138
51	166
52	152
53	159
54	129
55	96
56	91
57	61
58	74
59	98

n	a(n)
1	1
2	2
3	3
4	5
5	8
6	9
7	7
8	10
9	12
10	11
11	17
12	28
13	31
14	45
15	46
16	38
17	42
18	40
19	41
20	61
21	102
22	112
23	107
24	163
25	270
26	298
27	284
28	291
29	239
30	336
31	407
32	205
33	78
34	80
35	79
36	119
37	96
38	65
39	61
40	74
41	98
42	86
43	92
44	89
45	135
46	134
47	112
48	123
49	97
50	138
51	166
52	152
53	159
54	129
55	96
56	91
57	61
58	74
59	98