A382240 - cp's OEIS frontend

A382240 a(n) = Sum_{k=0..n} 3^((n+k-1)(n-k)/2) n! / (n-k)!.

n	a(n)
0	1
1	2
2	11
3	168
4	7233
5	889014
6	314965899
7	323989244676
8	972969439627809
9	8566667168429128842
10	221877626825222187484203
11	16949442370817602102051560384
12	3827091229259231090623800852526113
13	2558686452439976557585601153755243553406
14	5072634396431144733070212976874036427346208619

[1, 2, 11, 168, 7233, 889014, 314965899, 323989244676, 972969439627809, 8566667168429128842, 221877626825222187484203, 16949442370817602102051560384, 3827091229259231090623800852526113, 2558686452439976557585601153755243553406, 5072634396431144733070212976874036427346208619]

cp's OEIS Frontend

A382240 a(n) = Sum_{k=0..n} 3^((n+k-1)(n-k)/2) n! / (n-k)!.

Table of values

List of values

cp's OEIS Frontend

A382240 a(n) = Sum_{k=0..n} 3^((n+k-1)*(n-k)/2) * n! / (n-k)!.

Table of values

List of values

A382240 a(n) = Sum_{k=0..n} 3^((n+k-1)(n-k)/2) n! / (n-k)!.