A345020 - cp's OEIS frontend

A345020 a(0) = a(1) = 1, a(n) = largest natural number m <= a(n-1) + a(n-2) where gcd(m,a(k)) = 1 for all 1 < k <= n-1.

n	a(n)
0	1
1	1
2	2
3	3
4	5
5	7
6	11
7	17
8	23
9	37
10	59
11	89
12	139
13	227
14	361
15	587
16	947
17	1531
18	2477
19	4007
20	6481
21	10487
22	16963
23	27449
24	44393
25	71837
26	116227
27	188063
28	304289
29	492343
30	796627
31	1288967
32	2085593
33	3374557
34	5460139
35	8834689
36	14294827
37	23129507
38	37424333
39	60553837
40	97978169

[1, 1, 2, 3, 5, 7, 11, 17, 23, 37, 59, 89, 139, 227, 361, 587, 947, 1531, 2477, 4007, 6481, 10487, 16963, 27449, 44393, 71837, 116227, 188063, 304289, 492343, 796627, 1288967, 2085593, 3374557, 5460139, 8834689, 14294827, 23129507, 37424333, 60553837, 97978169]

cp's OEIS Frontend

A345020 a(0) = a(1) = 1, a(n) = largest natural number m <= a(n-1) + a(n-2) where gcd(m,a(k)) = 1 for all 1 < k <= n-1.

Table of values

List of values