A123664 - cp's OEIS frontend

A123664 a(1) = 1, a(2) = 2; then all new products of subsets of pre-existing terms which include the most recent, then the first integer not present and so on.

n	a(n)
1	1
2	2
3	3
4	6
5	4
6	8
7	12
8	24
9	48
10	72
11	144
12	5
13	10
14	15
15	20
16	30
17	40
18	60
19	80
20	90
21	120
22	160
23	180
24	240
25	320
26	360
27	480
28	720
29	960
30	1080
31	1440
32	1920
33	2160
34	2880
35	3840
36	4320
37	5760
38	6480
39	7680
40	8640
41	11520
42	12960
43	15360
44	17280
45	23040
46	25920
47	34560
48	46080
49	51840
50	69120
51	77760

[1, 2, 3, 6, 4, 8, 12, 24, 48, 72, 144, 5, 10, 15, 20, 30, 40, 60, 80, 90, 120, 160, 180, 240, 320, 360, 480, 720, 960, 1080, 1440, 1920, 2160, 2880, 3840, 4320, 5760, 6480, 7680, 8640, 11520, 12960, 15360, 17280, 23040, 25920, 34560, 46080, 51840, 69120, 77760]

cp's OEIS Frontend

A123664 a(1) = 1, a(2) = 2; then all new products of subsets of pre-existing terms which include the most recent, then the first integer not present and so on.

Table of values

List of values