A100320 - cp's OEIS frontend

A100320 A Catalan transform of (1 + 2x)/(1 - 2x).

n	a(n)
0	1
1	4
2	12
3	40
4	140
5	504
6	1848
7	6864
8	25740
9	97240
10	369512
11	1410864
12	5408312
13	20801200
14	80233200
15	310235040
16	1202160780
17	4667212440
18	18150270600
19	70690527600
20	275693057640
21	1076515748880
22	4208197927440
23	16466861455200
24	64495207366200
25	252821212875504
26	991837065896208

[1, 4, 12, 40, 140, 504, 1848, 6864, 25740, 97240, 369512, 1410864, 5408312, 20801200, 80233200, 310235040, 1202160780, 4667212440, 18150270600, 70690527600, 275693057640, 1076515748880, 4208197927440, 16466861455200, 64495207366200, 252821212875504, 991837065896208]

cp's OEIS Frontend

A100320 A Catalan transform of (1 + 2x)/(1 - 2x).

Table of values

List of values

cp's OEIS Frontend

A100320 A Catalan transform of (1 + 2*x)/(1 - 2*x).

Table of values

List of values

A100320 A Catalan transform of (1 + 2x)/(1 - 2x).