A174836 - cp's OEIS frontend

A174836 a(n) = 1 + ((6n-1)2^n + (-1)^n)/3.

n	a(n)
0	1
1	4
2	16
3	46
4	124
5	310
6	748
7	1750
8	4012
9	9046
10	20140
11	44374
12	96940
13	210262
14	453292
15	972118
16	2075308
17	4412758
18	9349804
19	19748182
20	41593516
21	87381334
22	183151276
23	383079766
24	799713964
25	1666536790
26	3467291308
27	7203018070
28	14942907052
29	30959555926
30	64066595500
31	132428158294

[1, 4, 16, 46, 124, 310, 748, 1750, 4012, 9046, 20140, 44374, 96940, 210262, 453292, 972118, 2075308, 4412758, 9349804, 19748182, 41593516, 87381334, 183151276, 383079766, 799713964, 1666536790, 3467291308, 7203018070, 14942907052, 30959555926, 64066595500, 132428158294]

cp's OEIS Frontend

A174836 a(n) = 1 + ((6n-1)2^n + (-1)^n)/3.

Table of values

List of values

cp's OEIS Frontend

A174836 a(n) = 1 + ((6*n-1)*2^n + (-1)^n)/3.

Table of values

List of values

A174836 a(n) = 1 + ((6n-1)2^n + (-1)^n)/3.