A080498 - cp's OEIS frontend

A080498 a(n) = (n-c_1)(n-c_2)...(n-c_k) where c_k is the k-th composite number and is also the largest composite number < n.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	3
8	8
9	15
10	48
11	210
12	1152
13	3780
14	19200
15	62370
16	322560
17	2162160
18	17418240
19	81081000
20	567705600
21	2481078600
22	16907304960
23	146659312800
24	1504935936000
25	8799558768000
26	76435881984000
27	819678899239200

[1, 1, 1, 1, 1, 2, 3, 8, 15, 48, 210, 1152, 3780, 19200, 62370, 322560, 2162160, 17418240, 81081000, 567705600, 2481078600, 16907304960, 146659312800, 1504935936000, 8799558768000, 76435881984000, 819678899239200]

cp's OEIS Frontend

A080498 a(n) = (n-c_1)(n-c_2)...(n-c_k) where c_k is the k-th composite number and is also the largest composite number < n.

Table of values

List of values