A167667 - cp's OEIS frontend

A167667 Expansion of (1-x+4x^2)/(1-2x)^2.

n	a(n)
0	1
1	3
2	12
3	36
4	96
5	240
6	576
7	1344
8	3072
9	6912
10	15360
11	33792
12	73728
13	159744
14	344064
15	737280
16	1572864
17	3342336
18	7077888
19	14942208
20	31457280
21	66060288
22	138412032
23	289406976
24	603979776
25	1258291200
26	2617245696
27	5435817984
28	11274289152
29	23353884672
30	48318382080

[1, 3, 12, 36, 96, 240, 576, 1344, 3072, 6912, 15360, 33792, 73728, 159744, 344064, 737280, 1572864, 3342336, 7077888, 14942208, 31457280, 66060288, 138412032, 289406976, 603979776, 1258291200, 2617245696, 5435817984, 11274289152, 23353884672, 48318382080]

cp's OEIS Frontend

A167667 Expansion of (1-x+4x^2)/(1-2x)^2.

Table of values

List of values

cp's OEIS Frontend

A167667 Expansion of (1-x+4*x^2)/(1-2*x)^2.

Table of values

List of values

A167667 Expansion of (1-x+4x^2)/(1-2x)^2.