A177186 - cp's OEIS frontend

A177186 a(n+1) = a(n) + p, where p is the largest prime dividing a(n) but not a(n-1), or 1 if there is no such prime.

n	a(n)
1	1
2	2
3	4
4	5
5	10
6	12
7	15
8	20
9	22
10	33
11	36
12	38
13	57
14	60
15	65
16	78
17	81
18	82
19	123
20	126
21	133
22	152
23	154
24	165
25	170
26	187
27	198
28	201
29	268
30	270
31	275
32	286
33	299
34	322
35	329
36	376
37	378
38	385
39	396
40	399
41	418
42	429
43	442
44	459
45	462
46	473
47	516
48	519
49	692
50	694
51	1041
52	1044
53	1073
54	1110
55	1115
56	1338

[1, 2, 4, 5, 10, 12, 15, 20, 22, 33, 36, 38, 57, 60, 65, 78, 81, 82, 123, 126, 133, 152, 154, 165, 170, 187, 198, 201, 268, 270, 275, 286, 299, 322, 329, 376, 378, 385, 396, 399, 418, 429, 442, 459, 462, 473, 516, 519, 692, 694, 1041, 1044, 1073, 1110, 1115, 1338]

cp's OEIS Frontend

A177186 a(n+1) = a(n) + p, where p is the largest prime dividing a(n) but not a(n-1), or 1 if there is no such prime.

Table of values

List of values