A368890 - cp's OEIS frontend

A368890 a(n) = Sum_{k=0..floor(n/2)} n^(3(n-2k)) * binomial(n-k,k).

n	a(n)
0	1
1	1
2	65
3	19737
4	16789505
5	30525391000
6	101570840860033
7	558574349855881107
8	4722492584690006360065
9	58150612359276833311664895
10	1000009000028000035000015000001
11	23225285520096132372224712190010064
12	708804486128121003209727133170234347521

[1, 1, 65, 19737, 16789505, 30525391000, 101570840860033, 558574349855881107, 4722492584690006360065, 58150612359276833311664895, 1000009000028000035000015000001, 23225285520096132372224712190010064, 708804486128121003209727133170234347521]

cp's OEIS Frontend

A368890 a(n) = Sum_{k=0..floor(n/2)} n^(3(n-2k)) * binomial(n-k,k).

Table of values

List of values

cp's OEIS Frontend

A368890 a(n) = Sum_{k=0..floor(n/2)} n^(3*(n-2*k)) * binomial(n-k,k).

Table of values

List of values

A368890 a(n) = Sum_{k=0..floor(n/2)} n^(3(n-2k)) * binomial(n-k,k).