A001834 - cp's OEIS frontend

A001834 a(0) = 1, a(1) = 5, a(n) = 4*a(n-1) - a(n-2).

n	a(n)
0	1
1	5
2	19
3	71
4	265
5	989
6	3691
7	13775
8	51409
9	191861
10	716035
11	2672279
12	9973081
13	37220045
14	138907099
15	518408351
16	1934726305
17	7220496869
18	26947261171
19	100568547815
20	375326930089
21	1400739172541
22	5227629760075
23	19509779867759
24	72811489710961
25	271736178976085

[1, 5, 19, 71, 265, 989, 3691, 13775, 51409, 191861, 716035, 2672279, 9973081, 37220045, 138907099, 518408351, 1934726305, 7220496869, 26947261171, 100568547815, 375326930089, 1400739172541, 5227629760075, 19509779867759, 72811489710961, 271736178976085]

cp's OEIS Frontend

A001834 a(0) = 1, a(1) = 5, a(n) = 4*a(n-1) - a(n-2).

Table of values

List of values