A353009 - cp's OEIS frontend

A353009 a(n) = Sum_{k=0..floor(n/2)} (n-2k)^(n-2k).

n	a(n)
0	1
1	1
2	5
3	28
4	261
5	3153
6	46917
7	826696
8	16824133
9	388247185
10	10016824133
11	285699917796
12	8926117272389
13	303160806510049
14	11120932942830405
15	438197051187369424
16	18457865006652382021
17	827678458937524133601
18	39364865940303189957445

[1, 1, 5, 28, 261, 3153, 46917, 826696, 16824133, 388247185, 10016824133, 285699917796, 8926117272389, 303160806510049, 11120932942830405, 438197051187369424, 18457865006652382021, 827678458937524133601, 39364865940303189957445]

cp's OEIS Frontend

A353009 a(n) = Sum_{k=0..floor(n/2)} (n-2k)^(n-2k).

Table of values

List of values

cp's OEIS Frontend

A353009 a(n) = Sum_{k=0..floor(n/2)} (n-2*k)^(n-2*k).

Table of values

List of values

A353009 a(n) = Sum_{k=0..floor(n/2)} (n-2k)^(n-2k).