A098597 - cp's OEIS frontend

A098597 Numerator of Catalan(n)/2^(2n+1). Also, numerators of (2n-1)!!/(n+1)!. Odd part of the n-th Catalan number.

n	a(n)
0	1
1	1
2	1
3	5
4	7
5	21
6	33
7	429
8	715
9	2431
10	4199
11	29393
12	52003
13	185725
14	334305
15	9694845
16	17678835
17	64822395
18	119409675
19	883631595
20	1641030105
21	6116566755
22	11435320455
23	171529806825
24	322476036831
25	1215486600363
26	2295919134019
27	17383387729001
28	32968493968795
29	125280277081421

[1, 1, 1, 5, 7, 21, 33, 429, 715, 2431, 4199, 29393, 52003, 185725, 334305, 9694845, 17678835, 64822395, 119409675, 883631595, 1641030105, 6116566755, 11435320455, 171529806825, 322476036831, 1215486600363, 2295919134019, 17383387729001, 32968493968795, 125280277081421]

cp's OEIS Frontend

A098597 Numerator of Catalan(n)/2^(2n+1). Also, numerators of (2n-1)!!/(n+1)!. Odd part of the n-th Catalan number.

Table of values

List of values