A328000 - cp's OEIS frontend

A328000 a(n) = Sum_{k=0..n}(k!(n - k)!)/(floor(k/2)!floor((n - k)/2)!)^2.

n	a(n)
0	1
1	2
2	5
3	16
4	28
5	96
6	160
7	512
8	896
9	2560
10	4864
11	12288
12	25600
13	57344
14	131072
15	262144
16	655360
17	1179648
18	3211264
19	5242880
20	15466496
21	23068672
22	73400320
23	100663296
24	343932928
25	436207616
26	1593835520
27	1879048192
28	7314866176
29	8053063680
30	33285996544
31	34359738368

[1, 2, 5, 16, 28, 96, 160, 512, 896, 2560, 4864, 12288, 25600, 57344, 131072, 262144, 655360, 1179648, 3211264, 5242880, 15466496, 23068672, 73400320, 100663296, 343932928, 436207616, 1593835520, 1879048192, 7314866176, 8053063680, 33285996544, 34359738368]

cp's OEIS Frontend

A328000 a(n) = Sum_{k=0..n}(k!(n - k)!)/(floor(k/2)!floor((n - k)/2)!)^2.

Table of values

List of values

cp's OEIS Frontend

A328000 a(n) = Sum_{k=0..n}(k!*(n - k)!)/(floor(k/2)!*floor((n - k)/2)!)^2.

Table of values

List of values

A328000 a(n) = Sum_{k=0..n}(k!(n - k)!)/(floor(k/2)!floor((n - k)/2)!)^2.