A005054 - cp's OEIS frontend

A005054 a(0) = 1; a(n) = 4*5^(n-1) for n >= 1.

n	a(n)
0	1
1	4
2	20
3	100
4	500
5	2500
6	12500
7	62500
8	312500
9	1562500
10	7812500
11	39062500
12	195312500
13	976562500
14	4882812500
15	24414062500
16	122070312500
17	610351562500
18	3051757812500
19	15258789062500
20	76293945312500
21	381469726562500
22	1907348632812500
23	9536743164062500

[1, 4, 20, 100, 500, 2500, 12500, 62500, 312500, 1562500, 7812500, 39062500, 195312500, 976562500, 4882812500, 24414062500, 122070312500, 610351562500, 3051757812500, 15258789062500, 76293945312500, 381469726562500, 1907348632812500, 9536743164062500]

cp's OEIS Frontend

A005054 a(0) = 1; a(n) = 4*5^(n-1) for n >= 1.

Table of values

List of values