A180222 - cp's OEIS frontend

A180222 a(n) = 4a(n-1) + 8a(n-2), with a(1)=0 and a(2)=1.

n	a(n)
1	0
2	1
3	4
4	24
5	128
6	704
7	3840
8	20992
9	114688
10	626688
11	3424256
12	18710528
13	102236160
14	558628864
15	3052404736
16	16678649856
17	91133837312
18	497964548096
19	2720928890880
20	14867431948288
21	81237158920192
22	443888091267072
23	2425449636429824
24	13252903275855872

[0, 1, 4, 24, 128, 704, 3840, 20992, 114688, 626688, 3424256, 18710528, 102236160, 558628864, 3052404736, 16678649856, 91133837312, 497964548096, 2720928890880, 14867431948288, 81237158920192, 443888091267072, 2425449636429824, 13252903275855872]

cp's OEIS Frontend

A180222 a(n) = 4a(n-1) + 8a(n-2), with a(1)=0 and a(2)=1.

Table of values

List of values

cp's OEIS Frontend

A180222 a(n) = 4*a(n-1) + 8*a(n-2), with a(1)=0 and a(2)=1.

Table of values

List of values

A180222 a(n) = 4a(n-1) + 8a(n-2), with a(1)=0 and a(2)=1.