A281593 - cp's OEIS frontend

A281593 a(n) = b(n) - Sum_{j=0..n-1} b(j) with b(n) = binomial(2*n, n).

n	a(n)
0	1
1	1
2	3
3	11
4	41
5	153
6	573
7	2157
8	8163
9	31043
10	118559
11	454479
12	1747771
13	6740059
14	26055459
15	100939779
16	391785129
17	1523230569
18	5931153429
19	23126146629
20	90282147849
21	352846964649
22	1380430179489
23	5405662979649
24	21186405207549
25	83101804279101
26	326199124351701

[1, 1, 3, 11, 41, 153, 573, 2157, 8163, 31043, 118559, 454479, 1747771, 6740059, 26055459, 100939779, 391785129, 1523230569, 5931153429, 23126146629, 90282147849, 352846964649, 1380430179489, 5405662979649, 21186405207549, 83101804279101, 326199124351701]

cp's OEIS Frontend

A281593 a(n) = b(n) - Sum_{j=0..n-1} b(j) with b(n) = binomial(2*n, n).

Table of values

List of values