A125818 - cp's OEIS frontend

A125818 a(n) = ((1 + 3sqrt(2))^n + (1 - 3sqrt(2))^n)/2.

n	a(n)
1	1
2	1
3	19
4	55
5	433
6	1801
7	10963
8	52543
9	291457
10	1476145
11	7907059
12	40908583
13	216237169
14	1127920249
15	5931872371
16	31038388975
17	162918608257
18	853489829089
19	4476595998547
20	23462519091607
21	123027170158513
22	644917164874345
23	3381296222443411
24	17726184247750687

[1, 1, 19, 55, 433, 1801, 10963, 52543, 291457, 1476145, 7907059, 40908583, 216237169, 1127920249, 5931872371, 31038388975, 162918608257, 853489829089, 4476595998547, 23462519091607, 123027170158513, 644917164874345, 3381296222443411, 17726184247750687]

cp's OEIS Frontend

A125818 a(n) = ((1 + 3sqrt(2))^n + (1 - 3sqrt(2))^n)/2.

Table of values

List of values

cp's OEIS Frontend

A125818 a(n) = ((1 + 3*sqrt(2))^n + (1 - 3*sqrt(2))^n)/2.

Table of values

List of values

A125818 a(n) = ((1 + 3sqrt(2))^n + (1 - 3sqrt(2))^n)/2.