A383868 - cp's OEIS frontend

A383868 a(n) = 2^(n-3)(3binomial(n,4) + 4*binomial(n,2) + 8).

n	a(n)
0	1
1	2
2	6
3	20
4	70
5	252
6	904
7	3152
8	10560
9	33920
10	104704
11	311808
12	899584
13	2524160
14	6912000
15	18526208
16	48726016
17	126025728
18	321126400
19	807403520
20	2005794816
21	4929093632
22	11994136576
23	28924968960
24	69185044480
25	164240556032
26	387201368064
27	907009851392
28	2112083722240

[1, 2, 6, 20, 70, 252, 904, 3152, 10560, 33920, 104704, 311808, 899584, 2524160, 6912000, 18526208, 48726016, 126025728, 321126400, 807403520, 2005794816, 4929093632, 11994136576, 28924968960, 69185044480, 164240556032, 387201368064, 907009851392, 2112083722240]

cp's OEIS Frontend

A383868 a(n) = 2^(n-3)(3binomial(n,4) + 4*binomial(n,2) + 8).

Table of values

List of values

cp's OEIS Frontend

A383868 a(n) = 2^(n-3)*(3*binomial(n,4) + 4*binomial(n,2) + 8).

Table of values

List of values

A383868 a(n) = 2^(n-3)(3binomial(n,4) + 4*binomial(n,2) + 8).