A140322 - cp's OEIS frontend

A140322 a(n) = -1/6 + (-1)^n/2 + 2*4^n/3.

n	a(n)
0	1
1	2
2	11
3	42
4	171
5	682
6	2731
7	10922
8	43691
9	174762
10	699051
11	2796202
12	11184811
13	44739242
14	178956971
15	715827882
16	2863311531
17	11453246122
18	45812984491
19	183251937962
20	733007751851
21	2932031007402
22	11728124029611
23	46912496118442
24	187649984473771
25	750599937895082

[1, 2, 11, 42, 171, 682, 2731, 10922, 43691, 174762, 699051, 2796202, 11184811, 44739242, 178956971, 715827882, 2863311531, 11453246122, 45812984491, 183251937962, 733007751851, 2932031007402, 11728124029611, 46912496118442, 187649984473771, 750599937895082]

cp's OEIS Frontend

A140322 a(n) = -1/6 + (-1)^n/2 + 2*4^n/3.

Table of values

List of values