A125817 - cp's OEIS frontend

A125817 a(n) = ((1 + 3sqrt(2))^n - (1 - 3sqrt(2))^n)/(2*sqrt(2)).

n	a(n)
0	0
1	3
2	6
3	63
4	228
5	1527
6	6930
7	39819
8	197448
9	1071819
10	5500254
11	29221431
12	151947180
13	800658687
14	4184419434
15	21980036547
16	115095203472
17	603851028243
18	3164320515510
19	16594108511151
20	86981665785972
21	456063176261511
22	2390814670884546
23	12534703338214779

[0, 3, 6, 63, 228, 1527, 6930, 39819, 197448, 1071819, 5500254, 29221431, 151947180, 800658687, 4184419434, 21980036547, 115095203472, 603851028243, 3164320515510, 16594108511151, 86981665785972, 456063176261511, 2390814670884546, 12534703338214779]

cp's OEIS Frontend

A125817 a(n) = ((1 + 3sqrt(2))^n - (1 - 3sqrt(2))^n)/(2*sqrt(2)).

Table of values

List of values

cp's OEIS Frontend

A125817 a(n) = ((1 + 3*sqrt(2))^n - (1 - 3*sqrt(2))^n)/(2*sqrt(2)).

Table of values

List of values

A125817 a(n) = ((1 + 3sqrt(2))^n - (1 - 3sqrt(2))^n)/(2*sqrt(2)).