A113861 - cp's OEIS frontend

A113861 a(n) = (1/9)((6n - 7)*2^(n-1) - (-1)^n).

n	a(n)
1	0
2	1
3	5
4	15
5	41
6	103
7	249
8	583
9	1337
10	3015
11	6713
12	14791
13	32313
14	70087
15	151097
16	324039
17	691769
18	1470919
19	3116601
20	6582727
21	13864505
22	29127111
23	61050425
24	127693255
25	266571321
26	555512263
27	1155763769
28	2401006023
29	4980969017
30	10319851975
31	21355531833
32	44142719431

[0, 1, 5, 15, 41, 103, 249, 583, 1337, 3015, 6713, 14791, 32313, 70087, 151097, 324039, 691769, 1470919, 3116601, 6582727, 13864505, 29127111, 61050425, 127693255, 266571321, 555512263, 1155763769, 2401006023, 4980969017, 10319851975, 21355531833, 44142719431]

cp's OEIS Frontend

A113861 a(n) = (1/9)((6n - 7)*2^(n-1) - (-1)^n).

Table of values

List of values

cp's OEIS Frontend

A113861 a(n) = (1/9)*((6*n - 7)*2^(n-1) - (-1)^n).

Table of values

List of values

A113861 a(n) = (1/9)((6n - 7)*2^(n-1) - (-1)^n).