A344216 - cp's OEIS frontend

A344216 a(n) = n!((n+1)/2 + 2Sum_{k=2..n-1}(n-k)/(k+1)).

n	a(n)
1	1
2	3
3	16
4	104
5	768
6	6336
7	57888
8	581472
9	6379200
10	75977280
11	977045760
12	13499930880
13	199537067520
14	3142504512000
15	52546707763200
16	929908914278400
17	17366044153651200
18	341336836618444800
19	7044417438363648000

[1, 3, 16, 104, 768, 6336, 57888, 581472, 6379200, 75977280, 977045760, 13499930880, 199537067520, 3142504512000, 52546707763200, 929908914278400, 17366044153651200, 341336836618444800, 7044417438363648000]

cp's OEIS Frontend

A344216 a(n) = n!((n+1)/2 + 2Sum_{k=2..n-1}(n-k)/(k+1)).

Table of values

List of values

cp's OEIS Frontend

A344216 a(n) = n!*((n+1)/2 + 2*Sum_{k=2..n-1}(n-k)/(k+1)).

Table of values

List of values

A344216 a(n) = n!((n+1)/2 + 2Sum_{k=2..n-1}(n-k)/(k+1)).