A366048 - cp's OEIS frontend

A366048 For n >= 1, a(n) is the least k >= 1 such that 1/d(k) + … + 1/d(k + n - 1) is an integer, d(i) = A000005(i).

n	a(n)
1	1
2	2
3	1
4	25
5	54
6	7
7	53
8	65
9	6
10	22
11	51
12	49
13	343
14	209
15	416
16	624
17	17
18	18
19	338
20	410
21	1622
22	341
23	140
24	849
25	139
26	337
27	1939
28	338
29	849
30	4365
31	2565
32	6368
33	496
34	4366
35	132
36	8392
37	131
38	4453
39	128
40	4173
41	127
42	487
43	123
44	4437
45	492
46	122
47	3011
48	491
49	3724
50	4171
51	2637
52	1231
53	1631
54	12765
55	119

[1, 2, 1, 25, 54, 7, 53, 65, 6, 22, 51, 49, 343, 209, 416, 624, 17, 18, 338, 410, 1622, 341, 140, 849, 139, 337, 1939, 338, 849, 4365, 2565, 6368, 496, 4366, 132, 8392, 131, 4453, 128, 4173, 127, 487, 123, 4437, 492, 122, 3011, 491, 3724, 4171, 2637, 1231, 1631, 12765, 119]

cp's OEIS Frontend

A366048 For n >= 1, a(n) is the least k >= 1 such that 1/d(k) + … + 1/d(k + n - 1) is an integer, d(i) = A000005(i).

Table of values

List of values