A122946 - cp's OEIS frontend

A122946 a(0)=a(1)=0, a(2)=2; for n >= 3, a(n) = a(n-1) + 4*a(n-3).

n	a(n)
0	0
1	0
2	2
3	2
4	2
5	10
6	18
7	26
8	66
9	138
10	242
11	506
12	1058
13	2026
14	4050
15	8282
16	16386
17	32586
18	65714
19	131258
20	261602
21	524458
22	1049490
23	2095898
24	4193730
25	8391690
26	16775282
27	33550202
28	67116962
29	134218090
30	268418898
31	536886746
32	1073759106
33	2147434698
34	4294981682
35	8590018106

[0, 0, 2, 2, 2, 10, 18, 26, 66, 138, 242, 506, 1058, 2026, 4050, 8282, 16386, 32586, 65714, 131258, 261602, 524458, 1049490, 2095898, 4193730, 8391690, 16775282, 33550202, 67116962, 134218090, 268418898, 536886746, 1073759106, 2147434698, 4294981682, 8590018106]

cp's OEIS Frontend

A122946 a(0)=a(1)=0, a(2)=2; for n >= 3, a(n) = a(n-1) + 4*a(n-3).

Table of values

List of values