A196225 - cp's OEIS frontend

A196225 Smallest number k such that sigma(tau(k)) = n, or 0 if there is no such k.

n	a(n)
1	1
2	0
3	2
4	4
5	0
6	16
7	6
8	64
9	0
10	0
11	0
12	12
13	36
14	4096
15	24
16	0
17	0
18	48
19	0
20	262144
21	0
22	0
23	0
24	144
25	0
26	0
27	0
28	60
29	0
30	268435456
31	120
32	576
33	0
34	0
35	0
36	3072
37	0
38	68719476736
39	180
40	900
41	0
42	240
43	0
44	4398046511104
45	0
46	0
47	0
48	5184
49	0
50	0
51	0
52	0
53	0
54	196608
55	0
56	960
57	46656
58	0
59	0
60	360
61	0
62	1152921504606846976

[1, 0, 2, 4, 0, 16, 6, 64, 0, 0, 0, 12, 36, 4096, 24, 0, 0, 48, 0, 262144, 0, 0, 0, 144, 0, 0, 0, 60, 0, 268435456, 120, 576, 0, 0, 0, 3072, 0, 68719476736, 180, 900, 0, 240, 0, 4398046511104, 0, 0, 0, 5184, 0, 0, 0, 0, 0, 196608, 0, 960, 46656, 0, 0, 360, 0, 1152921504606846976]

cp's OEIS Frontend

A196225 Smallest number k such that sigma(tau(k)) = n, or 0 if there is no such k.

Table of values

List of values