A006130 - cp's OEIS frontend

A006130 a(n) = a(n-1) + 3*a(n-2) for n > 1, a(0) = a(1) = 1.

n	a(n)
0	1
1	1
2	4
3	7
4	19
5	40
6	97
7	217
8	508
9	1159
10	2683
11	6160
12	14209
13	32689
14	75316
15	173383
16	399331
17	919480
18	2117473
19	4875913
20	11228332
21	25856071
22	59541067
23	137109280
24	315732481
25	727060321
26	1674257764
27	3855438727
28	8878212019
29	20444528200
30	47079164257
31	108412748857

[1, 1, 4, 7, 19, 40, 97, 217, 508, 1159, 2683, 6160, 14209, 32689, 75316, 173383, 399331, 919480, 2117473, 4875913, 11228332, 25856071, 59541067, 137109280, 315732481, 727060321, 1674257764, 3855438727, 8878212019, 20444528200, 47079164257, 108412748857]

cp's OEIS Frontend

A006130 a(n) = a(n-1) + 3*a(n-2) for n > 1, a(0) = a(1) = 1.

Table of values

List of values