A243287 - cp's OEIS frontend

A243287 a(1)=1, and for n > 1, if n is k-th number divisible by the square of its largest prime factor (i.e., n = A070003(k)), a(n) = 1 + (2a(k)); otherwise, when n = A102750(k), a(n) = 2a(k).

n	a(n)
1	1
2	2
3	4
4	3
5	8
6	6
7	16
8	5
9	9
10	12
11	32
12	10
13	18
14	24
15	64
16	7
17	20
18	17
19	36
20	48
21	128
22	14
23	40
24	34
25	13
26	72
27	33
28	96
29	256
30	28
31	80
32	11
33	68
34	26
35	144
36	19
37	66
38	192
39	512
40	56
41	160
42	22
43	136
44	52
45	288
46	38
47	132
48	384
49	25
50	65
51	1024
52	112
53	320
54	21
55	44
56	272
57	104
58	576
59	76
60	264
61	768
62	50
63	130
64	37
65	2048

[1, 2, 4, 3, 8, 6, 16, 5, 9, 12, 32, 10, 18, 24, 64, 7, 20, 17, 36, 48, 128, 14, 40, 34, 13, 72, 33, 96, 256, 28, 80, 11, 68, 26, 144, 19, 66, 192, 512, 56, 160, 22, 136, 52, 288, 38, 132, 384, 25, 65, 1024, 112, 320, 21, 44, 272, 104, 576, 76, 264, 768, 50, 130, 37, 2048]

cp's OEIS Frontend

A243287 a(1)=1, and for n > 1, if n is k-th number divisible by the square of its largest prime factor (i.e., n = A070003(k)), a(n) = 1 + (2a(k)); otherwise, when n = A102750(k), a(n) = 2a(k).

Table of values

List of values

cp's OEIS Frontend

A243287 a(1)=1, and for n > 1, if n is k-th number divisible by the square of its largest prime factor (i.e., n = A070003(k)), a(n) = 1 + (2*a(k)); otherwise, when n = A102750(k), a(n) = 2*a(k).

Table of values

List of values

A243287 a(1)=1, and for n > 1, if n is k-th number divisible by the square of its largest prime factor (i.e., n = A070003(k)), a(n) = 1 + (2a(k)); otherwise, when n = A102750(k), a(n) = 2a(k).