A384614 - cp's OEIS frontend

A384614 Expansion of (1+x+x^2) / (1-x-3*x^2).

n	a(n)
0	1
1	2
2	6
3	12
4	30
5	66
6	156
7	354
8	822
9	1884
10	4350
11	10002
12	23052
13	53058
14	122214
15	281388
16	648030
17	1492194
18	3436284
19	7912866
20	18221718
21	41960316
22	96625470
23	222506418
24	512382828
25	1179902082
26	2717050566
27	6256756812
28	14407908510
29	33178178946
30	76401904476
31	175936441314

[1, 2, 6, 12, 30, 66, 156, 354, 822, 1884, 4350, 10002, 23052, 53058, 122214, 281388, 648030, 1492194, 3436284, 7912866, 18221718, 41960316, 96625470, 222506418, 512382828, 1179902082, 2717050566, 6256756812, 14407908510, 33178178946, 76401904476, 175936441314]

cp's OEIS Frontend

A384614 Expansion of (1+x+x^2) / (1-x-3*x^2).

Table of values

List of values