A070031 - cp's OEIS frontend

A070031 Expansion of (1+xC)C^3, where C = (1-sqrt(1-4x))/(2x) is g.f. for Catalan numbers, A000108.

n	a(n)
0	1
1	4
2	13
3	42
4	138
5	462
6	1573
7	5434
8	19006
9	67184
10	239666
11	861764
12	3120180
13	11366370
14	41630805
15	153216570
16	566343030
17	2101610280
18	7826451270
19	29240172780
20	109566326220
21	411671536380
22	1550629453698
23	5854180360932
24	22148866939948
25	83965042615552
26	318895250752708

[1, 4, 13, 42, 138, 462, 1573, 5434, 19006, 67184, 239666, 861764, 3120180, 11366370, 41630805, 153216570, 566343030, 2101610280, 7826451270, 29240172780, 109566326220, 411671536380, 1550629453698, 5854180360932, 22148866939948, 83965042615552, 318895250752708]

cp's OEIS Frontend

A070031 Expansion of (1+xC)C^3, where C = (1-sqrt(1-4x))/(2x) is g.f. for Catalan numbers, A000108.

Table of values

List of values

cp's OEIS Frontend

A070031 Expansion of (1+x*C)*C^3, where C = (1-sqrt(1-4*x))/(2*x) is g.f. for Catalan numbers, A000108.

Table of values

List of values

A070031 Expansion of (1+xC)C^3, where C = (1-sqrt(1-4x))/(2x) is g.f. for Catalan numbers, A000108.