A100133 - cp's OEIS frontend

A100133 a(n) = Sum_{k=0..floor(n/4)} C(n-2k,2k) * 3^k * 2^(n-4k).

n	a(n)
0	1
1	2
2	4
3	8
4	19
5	50
6	136
7	368
8	985
9	2618
10	6940
11	18392
12	48763
13	129338
14	343120
15	910304
16	2415025
17	6406898
18	16996852
19	45090728
20	119620579
21	317340098
22	841868632
23	2233386320
24	5924932489
25	15718204970
26	41698695820
27	110622122360

[1, 2, 4, 8, 19, 50, 136, 368, 985, 2618, 6940, 18392, 48763, 129338, 343120, 910304, 2415025, 6406898, 16996852, 45090728, 119620579, 317340098, 841868632, 2233386320, 5924932489, 15718204970, 41698695820, 110622122360]

cp's OEIS Frontend

A100133 a(n) = Sum_{k=0..floor(n/4)} C(n-2k,2k) * 3^k * 2^(n-4k).

Table of values

List of values