A163606 - cp's OEIS frontend

A163606 a(n) = ((3 + 2sqrt(2))(3 + sqrt(2))^n + (3 - 2sqrt(2))(3 - sqrt(2))^n)/2.

n	a(n)
0	3
1	13
2	57
3	251
4	1107
5	4885
6	21561
7	95171
8	420099
9	1854397
10	8185689
11	36133355
12	159500307
13	704068357
14	3107907993
15	13718969459
16	60558460803
17	267317978605
18	1179998646009
19	5208766025819
20	22992605632851
21	101494271616373

[3, 13, 57, 251, 1107, 4885, 21561, 95171, 420099, 1854397, 8185689, 36133355, 159500307, 704068357, 3107907993, 13718969459, 60558460803, 267317978605, 1179998646009, 5208766025819, 22992605632851, 101494271616373]

cp's OEIS Frontend

A163606 a(n) = ((3 + 2sqrt(2))(3 + sqrt(2))^n + (3 - 2sqrt(2))(3 - sqrt(2))^n)/2.

Table of values

List of values

cp's OEIS Frontend

A163606 a(n) = ((3 + 2*sqrt(2))*(3 + sqrt(2))^n + (3 - 2*sqrt(2))*(3 - sqrt(2))^n)/2.

Table of values

List of values

A163606 a(n) = ((3 + 2sqrt(2))(3 + sqrt(2))^n + (3 - 2sqrt(2))(3 - sqrt(2))^n)/2.