A167682 - cp's OEIS frontend

A167682 Expansion of (1 - 2x + 5x^2) / (1 - 3*x)^2.

n	a(n)
0	1
1	4
2	20
3	84
4	324
5	1188
6	4212
7	14580
8	49572
9	166212
10	551124
11	1810836
12	5904900
13	19131876
14	61647156
15	197696052
16	631351908
17	2008846980
18	6370914708
19	20145865428
20	63536960196
21	199908972324
22	627621192180
23	1966546402164
24	6150687683364
25	19205208480708

[1, 4, 20, 84, 324, 1188, 4212, 14580, 49572, 166212, 551124, 1810836, 5904900, 19131876, 61647156, 197696052, 631351908, 2008846980, 6370914708, 20145865428, 63536960196, 199908972324, 627621192180, 1966546402164, 6150687683364, 19205208480708]

cp's OEIS Frontend

A167682 Expansion of (1 - 2x + 5x^2) / (1 - 3*x)^2.

Table of values

List of values

cp's OEIS Frontend

A167682 Expansion of (1 - 2*x + 5*x^2) / (1 - 3*x)^2.

Table of values

List of values

A167682 Expansion of (1 - 2x + 5x^2) / (1 - 3*x)^2.