A305467 - cp's OEIS frontend

A305467 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)binomial(n-k,k)n^(n-2k)(-1)^k.

n	a(n)
0	1
1	1
2	7
3	150
4	5857
5	363045
6	32817311
7	4078256168
8	667231014401
9	139047475691385
10	35961972186044999
11	11303290914120251574
12	4243674498966718214113
13	1875719852330658989518045
14	964140893268009386931042943
15	570249392860305817156465883040

[1, 1, 7, 150, 5857, 363045, 32817311, 4078256168, 667231014401, 139047475691385, 35961972186044999, 11303290914120251574, 4243674498966718214113, 1875719852330658989518045, 964140893268009386931042943, 570249392860305817156465883040]

cp's OEIS Frontend

A305467 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)binomial(n-k,k)n^(n-2k)(-1)^k.

Table of values

List of values

cp's OEIS Frontend

A305467 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)*binomial(n-k,k)*n^(n-2*k)*(-1)^k.

Table of values

List of values

A305467 a(n) = Sum_{k=0..floor(n/2)} ((n-k)!/k!)binomial(n-k,k)n^(n-2k)(-1)^k.