A163755 - cp's OEIS frontend

A163755 a(0)=1. For n>=1, write n in binary. Let b(n,m) be the length of the m-th run of 0's or 1's, reading right to left. Then a(n) = product{m=1 to M} p(m)^b(n,m), where p(m) is the m-th prime, and M is the number of runs of 0's and 1's in binary n.

n	a(n)
0	1
1	2
2	6
3	4
4	12
5	30
6	18
7	8
8	24
9	90
10	210
11	60
12	36
13	150
14	54
15	16
16	48
17	270
18	1050
19	180
20	420
21	2310
22	630
23	120
24	72
25	450
26	1470
27	300
28	108
29	750
30	162
31	32
32	96
33	810
34	5250
35	540
36	2100
37	16170
38	3150
39	360
40	840
41	6930
42	30030
43	4620
44	1260
45	11550
46	1890
47	240
48	144
49	1350
50	7350
51	900
52	2940
53	25410

[1, 2, 6, 4, 12, 30, 18, 8, 24, 90, 210, 60, 36, 150, 54, 16, 48, 270, 1050, 180, 420, 2310, 630, 120, 72, 450, 1470, 300, 108, 750, 162, 32, 96, 810, 5250, 540, 2100, 16170, 3150, 360, 840, 6930, 30030, 4620, 1260, 11550, 1890, 240, 144, 1350, 7350, 900, 2940, 25410]

cp's OEIS Frontend

A163755 a(0)=1. For n>=1, write n in binary. Let b(n,m) be the length of the m-th run of 0's or 1's, reading right to left. Then a(n) = product{m=1 to M} p(m)^b(n,m), where p(m) is the m-th prime, and M is the number of runs of 0's and 1's in binary n.

Table of values

List of values