A105968 - cp's OEIS frontend

A105968 a(n) = 4a(n-1) - a(n-2) - 2(-1)^n, a(0) = 1, a(1) = 4.

n	a(n)
0	1
1	4
2	13
3	50
4	185
5	692
6	2581
7	9634
8	35953
9	134180
10	500765
11	1868882
12	6974761
13	26030164
14	97145893
15	362553410
16	1353067745
17	5049717572
18	18845802541
19	70333492594
20	262488167833
21	979619178740
22	3655988547125
23	13644335009762
24	50921351491921
25	190041070957924

[1, 4, 13, 50, 185, 692, 2581, 9634, 35953, 134180, 500765, 1868882, 6974761, 26030164, 97145893, 362553410, 1353067745, 5049717572, 18845802541, 70333492594, 262488167833, 979619178740, 3655988547125, 13644335009762, 50921351491921, 190041070957924]

cp's OEIS Frontend

A105968 a(n) = 4a(n-1) - a(n-2) - 2(-1)^n, a(0) = 1, a(1) = 4.

Table of values

List of values

cp's OEIS Frontend

A105968 a(n) = 4*a(n-1) - a(n-2) - 2*(-1)^n, a(0) = 1, a(1) = 4.

Table of values

List of values

A105968 a(n) = 4a(n-1) - a(n-2) - 2(-1)^n, a(0) = 1, a(1) = 4.