A056487 - cp's OEIS frontend

A056487 a(n) = 5^(n/2) for n even, a(n) = 3*5^((n-1)/2) for n odd.

n	a(n)
0	1
1	3
2	5
3	15
4	25
5	75
6	125
7	375
8	625
9	1875
10	3125
11	9375
12	15625
13	46875
14	78125
15	234375
16	390625
17	1171875
18	1953125
19	5859375
20	9765625
21	29296875
22	48828125
23	146484375
24	244140625
25	732421875
26	1220703125
27	3662109375
28	6103515625
29	18310546875
30	30517578125
31	91552734375

[1, 3, 5, 15, 25, 75, 125, 375, 625, 1875, 3125, 9375, 15625, 46875, 78125, 234375, 390625, 1171875, 1953125, 5859375, 9765625, 29296875, 48828125, 146484375, 244140625, 732421875, 1220703125, 3662109375, 6103515625, 18310546875, 30517578125, 91552734375]

cp's OEIS Frontend

A056487 a(n) = 5^(n/2) for n even, a(n) = 3*5^((n-1)/2) for n odd.

Table of values

List of values