A238696 - cp's OEIS frontend

A238696 a(n) = Sum_{k=0..floor(n/2)} binomial(n(n-k), nk).

n	a(n)
0	1
1	1
2	2
3	21
4	497
5	18508
6	3297933
7	2348121769
8	2319121509374
9	4535739243360613
10	58887253765506968848
11	1694438232474931034462251
12	64598311562133275526222276162
13	8312693334404799592869803398802772
14	5827069387752679429926992257426553147833

[1, 1, 2, 21, 497, 18508, 3297933, 2348121769, 2319121509374, 4535739243360613, 58887253765506968848, 1694438232474931034462251, 64598311562133275526222276162, 8312693334404799592869803398802772, 5827069387752679429926992257426553147833]

cp's OEIS Frontend

A238696 a(n) = Sum_{k=0..floor(n/2)} binomial(n(n-k), nk).

Table of values

List of values

cp's OEIS Frontend

A238696 a(n) = Sum_{k=0..floor(n/2)} binomial(n*(n-k), n*k).

Table of values

List of values

A238696 a(n) = Sum_{k=0..floor(n/2)} binomial(n(n-k), nk).