A124740 - cp's OEIS frontend

A124740 a(n) = product of those positive integers which are coprime to both n and n+1 and which are <= n.

n	a(n)
1	1
2	1
3	1
4	3
5	1
6	5
7	15
8	35
9	7
10	189
11	35
12	385
13	1485
14	143
15	1001
16	2027025
17	5005
18	85085
19	459459
20	46189
21	20995
22	1249937325
23	1616615
24	7436429
25	324342711
26	71504125
27	132793375
28	1452095555625
29	7436429
30	215656441
31	6190283353629375
32	75969882625

[1, 1, 1, 3, 1, 5, 15, 35, 7, 189, 35, 385, 1485, 143, 1001, 2027025, 5005, 85085, 459459, 46189, 20995, 1249937325, 1616615, 7436429, 324342711, 71504125, 132793375, 1452095555625, 7436429, 215656441, 6190283353629375, 75969882625]

cp's OEIS Frontend

A124740 a(n) = product of those positive integers which are coprime to both n and n+1 and which are <= n.

Table of values

List of values