A361752 - cp's OEIS frontend

A361752 a(n) = Sum_{k=0..floor(n/2)} binomial(2(n-2k),k) * binomial(2(n-2k),n-2*k).

n	a(n)
0	1
1	2
2	6
3	24
4	94
5	374
6	1520
7	6252
8	25942
9	108408
10	455586
11	1923444
12	8151856
13	34661252
14	147788484
15	631660788
16	2705471254
17	11609393084
18	49899207640
19	214792704256
20	925811868178
21	3995288307392
22	17260287754284
23	74641620619072
24	323080683587056
25	1399606566298916

[1, 2, 6, 24, 94, 374, 1520, 6252, 25942, 108408, 455586, 1923444, 8151856, 34661252, 147788484, 631660788, 2705471254, 11609393084, 49899207640, 214792704256, 925811868178, 3995288307392, 17260287754284, 74641620619072, 323080683587056, 1399606566298916]

cp's OEIS Frontend

A361752 a(n) = Sum_{k=0..floor(n/2)} binomial(2(n-2k),k) * binomial(2(n-2k),n-2*k).

Table of values

List of values

cp's OEIS Frontend

A361752 a(n) = Sum_{k=0..floor(n/2)} binomial(2*(n-2*k),k) * binomial(2*(n-2*k),n-2*k).

Table of values

List of values

A361752 a(n) = Sum_{k=0..floor(n/2)} binomial(2(n-2k),k) * binomial(2(n-2k),n-2*k).