A049027 - cp's OEIS frontend

A049027 G.f.: (1-2xc(x))/(1-3xc(x)) where c(x) = (1 - sqrt(1-4x))/(2x) is the g.f. for Catalan numbers A000108.

n	a(n)
0	1
1	1
2	4
3	17
4	74
5	326
6	1446
7	6441
8	28770
9	128750
10	576944
11	2587850
12	11615932
13	52167688
14	234383146
15	1053386937
16	4735393794
17	21291593238
18	95747347176
19	430624242942
20	1936925461644
21	8712882517188
22	39195738193836
23	176335080590442
24	793336332850164
25	3569368545752076

[1, 1, 4, 17, 74, 326, 1446, 6441, 28770, 128750, 576944, 2587850, 11615932, 52167688, 234383146, 1053386937, 4735393794, 21291593238, 95747347176, 430624242942, 1936925461644, 8712882517188, 39195738193836, 176335080590442, 793336332850164, 3569368545752076]

cp's OEIS Frontend

A049027 G.f.: (1-2xc(x))/(1-3xc(x)) where c(x) = (1 - sqrt(1-4x))/(2x) is the g.f. for Catalan numbers A000108.

Table of values

List of values

cp's OEIS Frontend

A049027 G.f.: (1-2*x*c(x))/(1-3*x*c(x)) where c(x) = (1 - sqrt(1-4*x))/(2*x) is the g.f. for Catalan numbers A000108.

Table of values

List of values

A049027 G.f.: (1-2xc(x))/(1-3xc(x)) where c(x) = (1 - sqrt(1-4x))/(2x) is the g.f. for Catalan numbers A000108.