A187274 - cp's OEIS frontend

A187274 a(n) = n4^(n/2 - 1)(9 + (-1)^n).

n	a(n)
0	0
1	4
2	20
3	48
4	160
5	320
6	960
7	1792
8	5120
9	9216
10	25600
11	45056
12	122880
13	212992
14	573440
15	983040
16	2621440
17	4456448
18	11796480
19	19922944
20	52428800
21	88080384
22	230686720
23	385875968
24	1006632960
25	1677721600
26	4362076160
27	7247757312
28	18790481920
29	31138512896
30	80530636800
31	133143986176
32	343597383680

[0, 4, 20, 48, 160, 320, 960, 1792, 5120, 9216, 25600, 45056, 122880, 212992, 573440, 983040, 2621440, 4456448, 11796480, 19922944, 52428800, 88080384, 230686720, 385875968, 1006632960, 1677721600, 4362076160, 7247757312, 18790481920, 31138512896, 80530636800, 133143986176, 343597383680]

cp's OEIS Frontend

A187274 a(n) = n4^(n/2 - 1)(9 + (-1)^n).

Table of values

List of values

cp's OEIS Frontend

A187274 a(n) = n*4^(n/2 - 1)*(9 + (-1)^n).

Table of values

List of values

A187274 a(n) = n4^(n/2 - 1)(9 + (-1)^n).