A130318 - cp's OEIS frontend

A130318 Integer values of k!!/S(k), where S(k) is the sum of all odd numbers less than or equal to k, if k is odd, or the sum of all even numbers less than or equal to k, if k is even.

n	a(n)
0	1
1	1
2	4
3	128
4	11520
5	143360
6	425425
7	2064384
8	619315200
9	280284364800
10	6801567252480
11	27512370460575
12	178541140377600
13	152355106455552000
14	167834385271436083200
15	6074006324109115392000
16	29734853645550994565625
17	231916605102348042240000
18	392866729043377583554560000

[1, 1, 4, 128, 11520, 143360, 425425, 2064384, 619315200, 280284364800, 6801567252480, 27512370460575, 178541140377600, 152355106455552000, 167834385271436083200, 6074006324109115392000, 29734853645550994565625, 231916605102348042240000, 392866729043377583554560000]

cp's OEIS Frontend

A130318 Integer values of k!!/S(k), where S(k) is the sum of all odd numbers less than or equal to k, if k is odd, or the sum of all even numbers less than or equal to k, if k is even.

Table of values

List of values