A163072 - cp's OEIS frontend

A163072 a(n) = ((4+sqrt(5))(5+sqrt(5))^n + (4-sqrt(5))(5-sqrt(5))^n)/2.

n	a(n)
0	4
1	25
2	170
3	1200
4	8600
5	62000
6	448000
7	3240000
8	23440000
9	169600000
10	1227200000
11	8880000000
12	64256000000
13	464960000000
14	3364480000000
15	24345600000000
16	176166400000000
17	1274752000000000
18	9224192000000000
19	66746880000000000

[4, 25, 170, 1200, 8600, 62000, 448000, 3240000, 23440000, 169600000, 1227200000, 8880000000, 64256000000, 464960000000, 3364480000000, 24345600000000, 176166400000000, 1274752000000000, 9224192000000000, 66746880000000000]

cp's OEIS Frontend

A163072 a(n) = ((4+sqrt(5))(5+sqrt(5))^n + (4-sqrt(5))(5-sqrt(5))^n)/2.

Table of values

List of values

cp's OEIS Frontend

A163072 a(n) = ((4+sqrt(5))*(5+sqrt(5))^n + (4-sqrt(5))*(5-sqrt(5))^n)/2.

Table of values

List of values

A163072 a(n) = ((4+sqrt(5))(5+sqrt(5))^n + (4-sqrt(5))(5-sqrt(5))^n)/2.