A005013 - cp's OEIS frontend

A005013 a(n) = 3*a(n-2) - a(n-4), a(0)=0, a(1)=1, a(2)=1, a(3)=4. Alternates Fibonacci (A000045) and Lucas (A000032) sequences for even and odd n.

n	a(n)
0	0
1	1
2	1
3	4
4	3
5	11
6	8
7	29
8	21
9	76
10	55
11	199
12	144
13	521
14	377
15	1364
16	987
17	3571
18	2584
19	9349
20	6765
21	24476
22	17711
23	64079
24	46368
25	167761
26	121393
27	439204
28	317811
29	1149851
30	832040
31	3010349
32	2178309
33	7881196
34	5702887
35	20633239
36	14930352
37	54018521
38	39088169
39	141422324

[0, 1, 1, 4, 3, 11, 8, 29, 21, 76, 55, 199, 144, 521, 377, 1364, 987, 3571, 2584, 9349, 6765, 24476, 17711, 64079, 46368, 167761, 121393, 439204, 317811, 1149851, 832040, 3010349, 2178309, 7881196, 5702887, 20633239, 14930352, 54018521, 39088169, 141422324]

cp's OEIS Frontend

A005013 a(n) = 3*a(n-2) - a(n-4), a(0)=0, a(1)=1, a(2)=1, a(3)=4. Alternates Fibonacci (A000045) and Lucas (A000032) sequences for even and odd n.

Table of values

List of values