A005247 - cp's OEIS frontend

A005247 a(n) = 3*a(n-2) - a(n-4), a(0)=2, a(1)=1, a(2)=3, a(3)=2. Alternates Lucas (A000032) and Fibonacci (A000045) sequences for even and odd n.

n	a(n)
0	2
1	1
2	3
3	2
4	7
5	5
6	18
7	13
8	47
9	34
10	123
11	89
12	322
13	233
14	843
15	610
16	2207
17	1597
18	5778
19	4181
20	15127
21	10946
22	39603
23	28657
24	103682
25	75025
26	271443
27	196418
28	710647
29	514229
30	1860498
31	1346269
32	4870847
33	3524578
34	12752043
35	9227465
36	33385282
37	24157817

[2, 1, 3, 2, 7, 5, 18, 13, 47, 34, 123, 89, 322, 233, 843, 610, 2207, 1597, 5778, 4181, 15127, 10946, 39603, 28657, 103682, 75025, 271443, 196418, 710647, 514229, 1860498, 1346269, 4870847, 3524578, 12752043, 9227465, 33385282, 24157817]

cp's OEIS Frontend

A005247 a(n) = 3*a(n-2) - a(n-4), a(0)=2, a(1)=1, a(2)=3, a(3)=2. Alternates Lucas (A000032) and Fibonacci (A000045) sequences for even and odd n.

Table of values

List of values