A197271 - cp's OEIS frontend

A197271 a(n) = (10 / ((3n+1)(3n+2))) binomial(4*n, n).

n	a(n)
0	5
1	2
2	5
3	20
4	100
5	570
6	3542
7	23400
8	161820
9	1159400
10	8544965
11	64448228
12	495508780
13	3872033900
14	30680401500
15	246041115600
16	1993987498284
17	16310419381080
18	134519771966180
19	1117653277802000
20	9347742311507600
21	78652006531467930
22	665393840873409150
23	5657273782416664200
24	48318619683648190500

[5, 2, 5, 20, 100, 570, 3542, 23400, 161820, 1159400, 8544965, 64448228, 495508780, 3872033900, 30680401500, 246041115600, 1993987498284, 16310419381080, 134519771966180, 1117653277802000, 9347742311507600, 78652006531467930, 665393840873409150, 5657273782416664200, 48318619683648190500]

cp's OEIS Frontend

A197271 a(n) = (10 / ((3n+1)(3n+2))) binomial(4*n, n).

Table of values

List of values

cp's OEIS Frontend

A197271 a(n) = (10 / ((3*n+1)*(3*n+2))) * binomial(4*n, n).

Table of values

List of values

A197271 a(n) = (10 / ((3n+1)(3n+2))) binomial(4*n, n).