A383912 - cp's OEIS frontend

A383912 Expansion of (1+x) * (1+2x)/((1-x) (1-2x) (1-3*x)).

n	a(n)
0	1
1	9
2	45
3	177
4	621
5	2049
6	6525
7	20337
8	62541
9	190689
10	578205
11	1746897
12	5265261
13	15844929
14	47633085
15	143095857
16	429680781
17	1289828769
18	3871059165
19	11616323217
20	34855261101
21	104578366209
22	313760264445
23	941331124977
24	2824094038221
25	8472483441249
26	25417852976925

[1, 9, 45, 177, 621, 2049, 6525, 20337, 62541, 190689, 578205, 1746897, 5265261, 15844929, 47633085, 143095857, 429680781, 1289828769, 3871059165, 11616323217, 34855261101, 104578366209, 313760264445, 941331124977, 2824094038221, 8472483441249, 25417852976925]

cp's OEIS Frontend

A383912 Expansion of (1+x) * (1+2x)/((1-x) (1-2x) (1-3*x)).

Table of values

List of values

cp's OEIS Frontend

A383912 Expansion of (1+x) * (1+2*x)/((1-x) * (1-2*x) * (1-3*x)).

Table of values

List of values

A383912 Expansion of (1+x) * (1+2x)/((1-x) (1-2x) (1-3*x)).