A087447 - cp's OEIS frontend

A087447 a(0) = a(1) = 1; for n > 1, a(n) = (n+2)*2^(n-2).

n	a(n)
0	1
1	1
2	4
3	10
4	24
5	56
6	128
7	288
8	640
9	1408
10	3072
11	6656
12	14336
13	30720
14	65536
15	139264
16	294912
17	622592
18	1310720
19	2752512
20	5767168
21	12058624
22	25165824
23	52428800
24	109051904
25	226492416
26	469762048
27	973078528
28	2013265920
29	4160749568

[1, 1, 4, 10, 24, 56, 128, 288, 640, 1408, 3072, 6656, 14336, 30720, 65536, 139264, 294912, 622592, 1310720, 2752512, 5767168, 12058624, 25165824, 52428800, 109051904, 226492416, 469762048, 973078528, 2013265920, 4160749568]

cp's OEIS Frontend

A087447 a(0) = a(1) = 1; for n > 1, a(n) = (n+2)*2^(n-2).

Table of values

List of values