A001075 - cp's OEIS frontend

A001075 a(0) = 1, a(1) = 2, a(n) = 4*a(n-1) - a(n-2).

n	a(n)
0	1
1	2
2	7
3	26
4	97
5	362
6	1351
7	5042
8	18817
9	70226
10	262087
11	978122
12	3650401
13	13623482
14	50843527
15	189750626
16	708158977
17	2642885282
18	9863382151
19	36810643322
20	137379191137
21	512706121226
22	1913445293767
23	7141075053842
24	26650854921601
25	99462344632562
26	371198523608647

[1, 2, 7, 26, 97, 362, 1351, 5042, 18817, 70226, 262087, 978122, 3650401, 13623482, 50843527, 189750626, 708158977, 2642885282, 9863382151, 36810643322, 137379191137, 512706121226, 1913445293767, 7141075053842, 26650854921601, 99462344632562, 371198523608647]

cp's OEIS Frontend

A001075 a(0) = 1, a(1) = 2, a(n) = 4*a(n-1) - a(n-2).

Table of values

List of values