A370202 - cp's OEIS frontend

A370202 a(n) = a(n-3) + a(n-2) + gcd(a(n-2), a(n-1)) with a(1) = a(2) = a(3) = 1.

n	a(n)
1	1
2	1
3	1
4	3
5	3
6	7
7	7
8	17
9	15
10	25
11	37
12	41
13	63
14	79
15	105
16	143
17	185
18	249
19	329
20	435
21	579
22	767
23	1015
24	1347
25	1783
26	2363
27	3131
28	4147
29	5495
30	7279
31	9643
32	12775
33	16923
34	22419
35	29701
36	39343
37	52121
38	69045
39	91465
40	121171
41	160511
42	212637
43	281683
44	373149
45	494321
46	654833
47	867471

[1, 1, 1, 3, 3, 7, 7, 17, 15, 25, 37, 41, 63, 79, 105, 143, 185, 249, 329, 435, 579, 767, 1015, 1347, 1783, 2363, 3131, 4147, 5495, 7279, 9643, 12775, 16923, 22419, 29701, 39343, 52121, 69045, 91465, 121171, 160511, 212637, 281683, 373149, 494321, 654833, 867471]

cp's OEIS Frontend

A370202 a(n) = a(n-3) + a(n-2) + gcd(a(n-2), a(n-1)) with a(1) = a(2) = a(3) = 1.

Table of values

List of values