A122120 - cp's OEIS frontend

A122120 a(n) = 4a(n-1) + 9a(n-2), for n>1, with a(0)=1, a(1)=3.

n	a(n)
0	1
1	3
2	21
3	111
4	633
5	3531
6	19821
7	111063
8	622641
9	3490131
10	19564293
11	109668351
12	614752041
13	3446023323
14	19316861661
15	108281656551
16	606978381153
17	3402448433571
18	19072599164661
19	106912432560783
20	599303122725081

[1, 3, 21, 111, 633, 3531, 19821, 111063, 622641, 3490131, 19564293, 109668351, 614752041, 3446023323, 19316861661, 108281656551, 606978381153, 3402448433571, 19072599164661, 106912432560783, 599303122725081]

cp's OEIS Frontend

A122120 a(n) = 4a(n-1) + 9a(n-2), for n>1, with a(0)=1, a(1)=3.

Table of values

List of values

cp's OEIS Frontend

A122120 a(n) = 4*a(n-1) + 9*a(n-2), for n>1, with a(0)=1, a(1)=3.

Table of values

List of values

A122120 a(n) = 4a(n-1) + 9a(n-2), for n>1, with a(0)=1, a(1)=3.