A362303 - cp's OEIS frontend

A362303 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/6)^k * binomial(n-2k,k)/(n-2k)!.

n	a(n)
0	1
1	1
2	1
3	-2
4	-15
5	-49
6	241
7	3186
8	17473
9	-136835
10	-2591199
11	-19940194
12	214217521
13	5280969123
14	52303886545
15	-714177220574
16	-21687847310079
17	-262685369226919
18	4351534043729473
19	157014580915662750
20	2248361900084617201
21	-43790588385118719689

[1, 1, 1, -2, -15, -49, 241, 3186, 17473, -136835, -2591199, -19940194, 214217521, 5280969123, 52303886545, -714177220574, -21687847310079, -262685369226919, 4351534043729473, 157014580915662750, 2248361900084617201, -43790588385118719689]

cp's OEIS Frontend

A362303 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/6)^k * binomial(n-2k,k)/(n-2k)!.

Table of values

List of values

cp's OEIS Frontend

A362303 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/6)^k * binomial(n-2*k,k)/(n-2*k)!.

Table of values

List of values

A362303 a(n) = n! * Sum_{k=0..floor(n/3)} (-n/6)^k * binomial(n-2k,k)/(n-2k)!.