A155117 - cp's OEIS frontend

A155117 a(n) = 4a(n-1) + 4a(n-2), n>2, a(0)=1, a(1)=3, a(2)=15.

n	a(n)
0	1
1	3
2	15
3	72
4	348
5	1680
6	8112
7	39168
8	189120
9	913152
10	4409088
11	21288960
12	102792192
13	496324608
14	2396467200
15	11571167232
16	55870537728
17	269766819840
18	1302549430272
19	6289265000448
20	30367257722880
21	146626090893312

[1, 3, 15, 72, 348, 1680, 8112, 39168, 189120, 913152, 4409088, 21288960, 102792192, 496324608, 2396467200, 11571167232, 55870537728, 269766819840, 1302549430272, 6289265000448, 30367257722880, 146626090893312]

cp's OEIS Frontend

A155117 a(n) = 4a(n-1) + 4a(n-2), n>2, a(0)=1, a(1)=3, a(2)=15.

Table of values

List of values

cp's OEIS Frontend

A155117 a(n) = 4*a(n-1) + 4*a(n-2), n>2, a(0)=1, a(1)=3, a(2)=15.

Table of values

List of values

A155117 a(n) = 4a(n-1) + 4a(n-2), n>2, a(0)=1, a(1)=3, a(2)=15.