A068875 - cp's OEIS frontend

A068875 Expansion of (1 + xC)C, where C = (1 - (1 - 4x)^(1/2))/(2x) is the g.f. for Catalan numbers, A000108.

n	a(n)
0	1
1	2
2	4
3	10
4	28
5	84
6	264
7	858
8	2860
9	9724
10	33592
11	117572
12	416024
13	1485800
14	5348880
15	19389690
16	70715340
17	259289580
18	955277400
19	3534526380
20	13128240840
21	48932534040
22	182965127280
23	686119227300
24	2579808294648
25	9723892802904
26	36734706144304
27	139067101832008

[1, 2, 4, 10, 28, 84, 264, 858, 2860, 9724, 33592, 117572, 416024, 1485800, 5348880, 19389690, 70715340, 259289580, 955277400, 3534526380, 13128240840, 48932534040, 182965127280, 686119227300, 2579808294648, 9723892802904, 36734706144304, 139067101832008]

cp's OEIS Frontend

A068875 Expansion of (1 + xC)C, where C = (1 - (1 - 4x)^(1/2))/(2x) is the g.f. for Catalan numbers, A000108.

Table of values

List of values

cp's OEIS Frontend

A068875 Expansion of (1 + x*C)*C, where C = (1 - (1 - 4*x)^(1/2))/(2*x) is the g.f. for Catalan numbers, A000108.

Table of values

List of values

A068875 Expansion of (1 + xC)C, where C = (1 - (1 - 4x)^(1/2))/(2x) is the g.f. for Catalan numbers, A000108.