A368888 - cp's OEIS frontend

A368888 a(n) = Sum_{k=0..floor(n/2)} n^(2k) binomial(n-k,k).

n	a(n)
0	1
1	1
2	5
3	19
4	305
5	1976
6	54613
7	494901
8	19460545
9	226000855
10	11535280901
11	163226844144
12	10246715573041
13	170910034261721
14	12736193619206485
15	244588264748170651
16	21100437309369290497
17	458426839205360652760
18	44935948904379592796101

[1, 1, 5, 19, 305, 1976, 54613, 494901, 19460545, 226000855, 11535280901, 163226844144, 10246715573041, 170910034261721, 12736193619206485, 244588264748170651, 21100437309369290497, 458426839205360652760, 44935948904379592796101]

cp's OEIS Frontend

A368888 a(n) = Sum_{k=0..floor(n/2)} n^(2k) binomial(n-k,k).

Table of values

List of values

cp's OEIS Frontend

A368888 a(n) = Sum_{k=0..floor(n/2)} n^(2*k) * binomial(n-k,k).

Table of values

List of values

A368888 a(n) = Sum_{k=0..floor(n/2)} n^(2k) binomial(n-k,k).