A127360 - cp's OEIS frontend

A127360 a(n) = Sum_{k=0..n} binomial(n, floor(k/2))*4^(n-k).

n	a(n)
0	1
1	5
2	22
3	95
4	406
5	1730
6	7360
7	31295
8	133030
9	565430
10	2403172
11	10213670
12	43408444
13	184486580
14	784069252
15	3332296895
16	14162266630
17	60189642830
18	255806000260
19	1087175537570
20	4620496103956
21	19637108580380
22	83457711731152
23	354695275386470
24	1507454921406556

[1, 5, 22, 95, 406, 1730, 7360, 31295, 133030, 565430, 2403172, 10213670, 43408444, 184486580, 784069252, 3332296895, 14162266630, 60189642830, 255806000260, 1087175537570, 4620496103956, 19637108580380, 83457711731152, 354695275386470, 1507454921406556]

cp's OEIS Frontend

A127360 a(n) = Sum_{k=0..n} binomial(n, floor(k/2))*4^(n-k).

Table of values

List of values