A086901 - cp's OEIS frontend

A086901 a(1) = a(2) = 1; for n>2, a(n) = 4a(n-1) + 3a(n-2).

n	a(n)
1	1
2	1
3	7
4	31
5	145
6	673
7	3127
8	14527
9	67489
10	313537
11	1456615
12	6767071
13	31438129
14	146053729
15	678529303
16	3152278399
17	14644701505
18	68035641217
19	316076669383
20	1468413601183
21	6821884412881
22	31692778455073
23	147236767058935

[1, 1, 7, 31, 145, 673, 3127, 14527, 67489, 313537, 1456615, 6767071, 31438129, 146053729, 678529303, 3152278399, 14644701505, 68035641217, 316076669383, 1468413601183, 6821884412881, 31692778455073, 147236767058935]

cp's OEIS Frontend

A086901 a(1) = a(2) = 1; for n>2, a(n) = 4a(n-1) + 3a(n-2).

Table of values

List of values

cp's OEIS Frontend

A086901 a(1) = a(2) = 1; for n>2, a(n) = 4*a(n-1) + 3*a(n-2).

Table of values

List of values

A086901 a(1) = a(2) = 1; for n>2, a(n) = 4a(n-1) + 3a(n-2).