A358852 - cp's OEIS frontend

A358852 a(n) = n!Sum_{m=0..floor(n/3)} 1/binomial(n-m,2m).

n	a(n)
0	1
1	1
2	2
3	12
4	32
5	140
6	1512
7	6384
8	44928
9	749088
10	4299840
11	42546240
12	974695680
13	7061783040
14	90598072320
15	2640888230400
16	23099489280000
17	364696083763200
18	12881138586624000
19	132004210918809600
20	2475855534329856000
21	102587486964092928000
22	1205260977814806528000

[1, 1, 2, 12, 32, 140, 1512, 6384, 44928, 749088, 4299840, 42546240, 974695680, 7061783040, 90598072320, 2640888230400, 23099489280000, 364696083763200, 12881138586624000, 132004210918809600, 2475855534329856000, 102587486964092928000, 1205260977814806528000]

cp's OEIS Frontend

A358852 a(n) = n!Sum_{m=0..floor(n/3)} 1/binomial(n-m,2m).

Table of values

List of values

cp's OEIS Frontend

A358852 a(n) = n!*Sum_{m=0..floor(n/3)} 1/binomial(n-m,2*m).

Table of values

List of values

A358852 a(n) = n!Sum_{m=0..floor(n/3)} 1/binomial(n-m,2m).