A100513 - cp's OEIS frontend

A100513 Denominator of Sum_{k=0..n} 1/C(2n,2k).

n	a(n)
0	1
1	1
2	6
3	15
4	35
5	315
6	13860
7	3003
8	9009
9	765765
10	1385670
11	14549535
12	66927861
13	371821450
14	40156716600
15	145568097675
16	136745788725
17	128931743655
18	9025222055850
19	4281195077775
20	166966608033225
21	6845630929362225
22	26165522663340060
23	294362129962575675

[1, 1, 6, 15, 35, 315, 13860, 3003, 9009, 765765, 1385670, 14549535, 66927861, 371821450, 40156716600, 145568097675, 136745788725, 128931743655, 9025222055850, 4281195077775, 166966608033225, 6845630929362225, 26165522663340060, 294362129962575675]

cp's OEIS Frontend

A100513 Denominator of Sum_{k=0..n} 1/C(2n,2k).

Table of values

List of values

cp's OEIS Frontend

A100513 Denominator of Sum_{k=0..n} 1/C(2*n,2*k).

Table of values

List of values

A100513 Denominator of Sum_{k=0..n} 1/C(2n,2k).