A108486 - cp's OEIS frontend

A108486 Sum binomial(2n-2k,2k)3^k*2^(n-k), k=0..floor(n/2).

n	a(n)
0	1
1	2
2	10
3	80
4	412
5	2456
6	14680
7	85376
8	503056
9	2959136
10	17381536
11	102199040
12	600757696
13	3531251072
14	20758107520
15	122021457920
16	717273440512
17	4216334967296
18	24784750512640
19	145691471876096
20	856414086962176

[1, 2, 10, 80, 412, 2456, 14680, 85376, 503056, 2959136, 17381536, 102199040, 600757696, 3531251072, 20758107520, 122021457920, 717273440512, 4216334967296, 24784750512640, 145691471876096, 856414086962176]

cp's OEIS Frontend

A108486 Sum binomial(2n-2k,2k)3^k*2^(n-k), k=0..floor(n/2).

Table of values

List of values