A320009 - cp's OEIS frontend

A320009 a(0) = 1; for n > 0, a(n) = A000005(n) * a(n-A000005(n)), where A000005(n) gives the number of divisors of n.

n	a(n)
0	1
1	1
2	2
3	2
4	3
5	4
6	8
7	8
8	12
9	24
10	32
11	48
12	48
13	96
14	128
15	192
16	240
17	384
18	288
19	768
20	768
21	1536
22	1152
23	3072
24	1920
25	3456
26	4608
27	12288
28	6912
29	24576
30	9216
31	49152
32	27648
33	98304
34	36864
35	196608
36	110592
37	393216
38	147456
39	786432
40	221184
41	1572864
42	294912
43	3145728
44	884736
45	4718592
46	1179648
47	9437184
48	1474560
49	3538944
50	5308416
51	37748736
52	7077888
53	75497472

[1, 1, 2, 2, 3, 4, 8, 8, 12, 24, 32, 48, 48, 96, 128, 192, 240, 384, 288, 768, 768, 1536, 1152, 3072, 1920, 3456, 4608, 12288, 6912, 24576, 9216, 49152, 27648, 98304, 36864, 196608, 110592, 393216, 147456, 786432, 221184, 1572864, 294912, 3145728, 884736, 4718592, 1179648, 9437184, 1474560, 3538944, 5308416, 37748736, 7077888, 75497472]

cp's OEIS Frontend

A320009 a(0) = 1; for n > 0, a(n) = A000005(n) * a(n-A000005(n)), where A000005(n) gives the number of divisors of n.

Table of values

List of values