A006012 - cp's OEIS frontend

A006012 a(0) = 1, a(1) = 2, a(n) = 4a(n-1) - 2a(n-2), n >= 2.

n	a(n)
0	1
1	2
2	6
3	20
4	68
5	232
6	792
7	2704
8	9232
9	31520
10	107616
11	367424
12	1254464
13	4283008
14	14623104
15	49926400
16	170459392
17	581984768
18	1987020288
19	6784111616
20	23162405888
21	79081400320
22	270000789504
23	921840357376
24	3147359850496

[1, 2, 6, 20, 68, 232, 792, 2704, 9232, 31520, 107616, 367424, 1254464, 4283008, 14623104, 49926400, 170459392, 581984768, 1987020288, 6784111616, 23162405888, 79081400320, 270000789504, 921840357376, 3147359850496]

cp's OEIS Frontend

A006012 a(0) = 1, a(1) = 2, a(n) = 4a(n-1) - 2a(n-2), n >= 2.

Table of values

List of values

cp's OEIS Frontend

A006012 a(0) = 1, a(1) = 2, a(n) = 4*a(n-1) - 2*a(n-2), n >= 2.

Table of values

List of values

A006012 a(0) = 1, a(1) = 2, a(n) = 4a(n-1) - 2a(n-2), n >= 2.