A305465 - cp's OEIS frontend

A305465 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)binomial(n-k,k)n^(n-2*k).

n	a(n)
0	1
1	1
2	9
3	174
4	6433
5	387045
6	34372513
7	4223468872
8	685727920641
9	142133068151865
10	36615156774045001
11	11474421446955693006
12	4298048476279871328289
13	1896322606147540294800349
14	973319784969445114237699713
15	575000041101937659730069884960

[1, 1, 9, 174, 6433, 387045, 34372513, 4223468872, 685727920641, 142133068151865, 36615156774045001, 11474421446955693006, 4298048476279871328289, 1896322606147540294800349, 973319784969445114237699713, 575000041101937659730069884960]

cp's OEIS Frontend

A305465 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)binomial(n-k,k)n^(n-2*k).

Table of values

List of values

cp's OEIS Frontend

A305465 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)*binomial(n-k,k)*n^(n-2*k).

Table of values

List of values

A305465 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)binomial(n-k,k)n^(n-2*k).