A141551 - cp's OEIS frontend

A141551 Numbers k with property that if d divides k, then tau(tau(d)) also divides k.

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	24
7	36
8	48
9	60
10	72
11	84
12	96
13	108
14	120
15	132
16	144
17	156
18	180
19	192
20	204
21	228
22	240
23	252
24	276
25	288
26	300
27	324
28	348
29	360
30	372
31	396
32	444
33	468
34	480
35	492
36	516
37	564
38	576
39	588
40	600
41	612
42	636
43	684
44	708
45	720
46	732
47	804
48	828
49	840
50	852
51	876
52	900
53	948
54	960
55	972
56	996
57	1044
58	1068

[1, 2, 4, 6, 12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 180, 192, 204, 228, 240, 252, 276, 288, 300, 324, 348, 360, 372, 396, 444, 468, 480, 492, 516, 564, 576, 588, 600, 612, 636, 684, 708, 720, 732, 804, 828, 840, 852, 876, 900, 948, 960, 972, 996, 1044, 1068]

cp's OEIS Frontend

A141551 Numbers k with property that if d divides k, then tau(tau(d)) also divides k.

Table of values

List of values