A164589 - cp's OEIS frontend

A164589 a(n) = ((4 + 3sqrt(2))(1 + 2sqrt(2))^n + (4 - 3sqrt(2))(1 - 2sqrt(2))^n)/8.

n	a(n)
0	1
1	4
2	15
3	58
4	221
5	848
6	3243
7	12422
8	47545
9	182044
10	696903
11	2668114
12	10214549
13	39105896
14	149713635
15	573168542
16	2194332529
17	8400844852
18	32162017407
19	123129948778
20	471394019405
21	1804697680256
22	6909153496347
23	26451190754486
24	101266455983401
25	387691247248204

[1, 4, 15, 58, 221, 848, 3243, 12422, 47545, 182044, 696903, 2668114, 10214549, 39105896, 149713635, 573168542, 2194332529, 8400844852, 32162017407, 123129948778, 471394019405, 1804697680256, 6909153496347, 26451190754486, 101266455983401, 387691247248204]

cp's OEIS Frontend

A164589 a(n) = ((4 + 3sqrt(2))(1 + 2sqrt(2))^n + (4 - 3sqrt(2))(1 - 2sqrt(2))^n)/8.

Table of values

List of values

cp's OEIS Frontend

A164589 a(n) = ((4 + 3*sqrt(2))*(1 + 2*sqrt(2))^n + (4 - 3*sqrt(2))*(1 - 2*sqrt(2))^n)/8.

Table of values

List of values

A164589 a(n) = ((4 + 3sqrt(2))(1 + 2sqrt(2))^n + (4 - 3sqrt(2))(1 - 2sqrt(2))^n)/8.