A190644 - cp's OEIS frontend

A190644 Least number k>1 such that (tau(k-1)+tau(k+1))/tau(k) = n where tau = A000005.

n	a(n)
1	6
2	34
3	39
4	7
5	11
6	19
7	29
8	41
9	79
10	71
11	179
12	199
13	181
14	239
15	883
16	419
17	701
18	839
19	881
20	1429
21	2351
22	1259
23	1871
24	2161
25	4049
26	3079
27	3361
28	2521
29	6481
30	4159
31	6299
32	5279
33	11551
34	5039
35	20789
36	7561
37	25919
38	10079
39	16561
40	13441
41	38611
42	13859
43	23761
44	21839
45	100673
46	20161

[6, 34, 39, 7, 11, 19, 29, 41, 79, 71, 179, 199, 181, 239, 883, 419, 701, 839, 881, 1429, 2351, 1259, 1871, 2161, 4049, 3079, 3361, 2521, 6481, 4159, 6299, 5279, 11551, 5039, 20789, 7561, 25919, 10079, 16561, 13441, 38611, 13859, 23761, 21839, 100673, 20161]

cp's OEIS Frontend

A190644 Least number k>1 such that (tau(k-1)+tau(k+1))/tau(k) = n where tau = A000005.

Table of values

List of values