A071717 - cp's OEIS frontend

A071717 Expansion of (1 + x^2C)C^2, where C = (1 - sqrt(1-4x))/(2x) is g.f. for Catalan numbers, A000108.

n	a(n)
0	1
1	2
2	6
3	17
4	51
5	160
6	519
7	1727
8	5863
9	20228
10	70720
11	250002
12	892126
13	3209328
14	11626385
15	42378075
16	155307615
17	571925820
18	2115257100
19	7853744910
20	29263124250
21	109384710240
22	410075910270
23	1541481197334
24	5808790935126

[1, 2, 6, 17, 51, 160, 519, 1727, 5863, 20228, 70720, 250002, 892126, 3209328, 11626385, 42378075, 155307615, 571925820, 2115257100, 7853744910, 29263124250, 109384710240, 410075910270, 1541481197334, 5808790935126]

cp's OEIS Frontend

A071717 Expansion of (1 + x^2C)C^2, where C = (1 - sqrt(1-4x))/(2x) is g.f. for Catalan numbers, A000108.

Table of values

List of values

cp's OEIS Frontend

A071717 Expansion of (1 + x^2*C)*C^2, where C = (1 - sqrt(1-4*x))/(2*x) is g.f. for Catalan numbers, A000108.

Table of values

List of values

A071717 Expansion of (1 + x^2C)C^2, where C = (1 - sqrt(1-4x))/(2x) is g.f. for Catalan numbers, A000108.