A241530 - cp's OEIS frontend

A241530 a(n) = binomial(n,floor(n/2))binomial(n+1,floor(n/2+1/2))(1+floor(n/2))/(1+2*floor(n/2)).

n	a(n)
0	1
1	2
2	4
3	12
4	36
5	120
6	400
7	1400
8	4900
9	17640
10	63504
11	232848
12	853776
13	3171168
14	11778624
15	44169840
16	165636900
17	625739400
18	2363904400
19	8982836720
20	34134779536
21	130332794592
22	497634306624
23	1907598175392
24	7312459672336
25	28124844893600
26	108172480360000

[1, 2, 4, 12, 36, 120, 400, 1400, 4900, 17640, 63504, 232848, 853776, 3171168, 11778624, 44169840, 165636900, 625739400, 2363904400, 8982836720, 34134779536, 130332794592, 497634306624, 1907598175392, 7312459672336, 28124844893600, 108172480360000]

cp's OEIS Frontend

A241530 a(n) = binomial(n,floor(n/2))binomial(n+1,floor(n/2+1/2))(1+floor(n/2))/(1+2*floor(n/2)).

Table of values

List of values

cp's OEIS Frontend

A241530 a(n) = binomial(n,floor(n/2))*binomial(n+1,floor(n/2+1/2))*(1+floor(n/2))/(1+2*floor(n/2)).

Table of values

List of values

A241530 a(n) = binomial(n,floor(n/2))binomial(n+1,floor(n/2+1/2))(1+floor(n/2))/(1+2*floor(n/2)).