A111566 - cp's OEIS frontend

A111566 a(n) = ((1+sqrt(8))(2+sqrt(2))^n + (1-sqrt(8))(2-sqrt(2))^n)/2.

n	a(n)
0	1
1	6
2	22
3	76
4	260
5	888
6	3032
7	10352
8	35344
9	120672
10	412000
11	1406656
12	4802624
13	16397184
14	55983488
15	191139584
16	652591360
17	2228086272
18	7607162368
19	25972476928
20	88675582976
21	302757378048
22	1033678346240
23	3529198628864
24	12049437822976
25	41139354034176
26	140458540490752

[1, 6, 22, 76, 260, 888, 3032, 10352, 35344, 120672, 412000, 1406656, 4802624, 16397184, 55983488, 191139584, 652591360, 2228086272, 7607162368, 25972476928, 88675582976, 302757378048, 1033678346240, 3529198628864, 12049437822976, 41139354034176, 140458540490752]

cp's OEIS Frontend

A111566 a(n) = ((1+sqrt(8))(2+sqrt(2))^n + (1-sqrt(8))(2-sqrt(2))^n)/2.

Table of values

List of values

cp's OEIS Frontend

A111566 a(n) = ((1+sqrt(8))*(2+sqrt(2))^n + (1-sqrt(8))*(2-sqrt(2))^n)/2.

Table of values

List of values

A111566 a(n) = ((1+sqrt(8))(2+sqrt(2))^n + (1-sqrt(8))(2-sqrt(2))^n)/2.