A362304 - cp's OEIS frontend

A362304 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/3)^k * binomial(n-2k,k)/(n-2k)!.

n	a(n)
0	1
1	1
2	1
3	-5
4	-31
5	-99
6	1201
7	13231
8	70785
9	-1362311
10	-21562399
11	-161746749
12	4263108961
13	87979472725
14	849097038609
15	-28416142768649
16	-723086288422399
17	-8532476619366159
18	346207723221680065
19	10474480743776327179
20	146105160034616914401

[1, 1, 1, -5, -31, -99, 1201, 13231, 70785, -1362311, -21562399, -161746749, 4263108961, 87979472725, 849097038609, -28416142768649, -723086288422399, -8532476619366159, 346207723221680065, 10474480743776327179, 146105160034616914401]

cp's OEIS Frontend

A362304 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/3)^k * binomial(n-2k,k)/(n-2k)!.

Table of values

List of values

cp's OEIS Frontend

A362304 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/3)^k * binomial(n-2*k,k)/(n-2*k)!.

Table of values

List of values

A362304 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/3)^k * binomial(n-2k,k)/(n-2k)!.