A127981 - cp's OEIS frontend

A127981 a(n) = (n + 1/3)2^(n-1) - 1/2 + (-1)^(n-1)(1/6).

n	a(n)
1	1
2	4
3	13
4	34
5	85
6	202
7	469
8	1066
9	2389
10	5290
11	11605
12	25258
13	54613
14	117418
15	251221
16	535210
17	1135957
18	2402986
19	5068117
20	10660522
21	22369621
22	46836394
23	97867093
24	204122794
25	425022805
26	883600042
27	1834308949
28	3802835626
29	7874106709

[1, 4, 13, 34, 85, 202, 469, 1066, 2389, 5290, 11605, 25258, 54613, 117418, 251221, 535210, 1135957, 2402986, 5068117, 10660522, 22369621, 46836394, 97867093, 204122794, 425022805, 883600042, 1834308949, 3802835626, 7874106709]

cp's OEIS Frontend

A127981 a(n) = (n + 1/3)2^(n-1) - 1/2 + (-1)^(n-1)(1/6).

Table of values

List of values

cp's OEIS Frontend

A127981 a(n) = (n + 1/3)*2^(n-1) - 1/2 + (-1)^(n-1)*(1/6).

Table of values

List of values

A127981 a(n) = (n + 1/3)2^(n-1) - 1/2 + (-1)^(n-1)(1/6).