A367967 - cp's OEIS frontend

A367967 a(n) = 3/4(3^(n + 1) - 2n - 4*n^2 - 3).

n	a(n)
0	0
1	0
2	3
3	27
4	126
5	462
6	1521
7	4761
8	14556
9	44028
10	132543
11	398199
12	1195290
13	3586698
14	10761069
15	32284341
16	96854328
17	290564472
18	871695099
19	2615087187
20	7845263670
21	23535793350
22	70607382633
23	211822150737
24	635466455316
25	1906399369332
26	5719198111671
27	17157594338991

[0, 0, 3, 27, 126, 462, 1521, 4761, 14556, 44028, 132543, 398199, 1195290, 3586698, 10761069, 32284341, 96854328, 290564472, 871695099, 2615087187, 7845263670, 23535793350, 70607382633, 211822150737, 635466455316, 1906399369332, 5719198111671, 17157594338991]

cp's OEIS Frontend

A367967 a(n) = 3/4(3^(n + 1) - 2n - 4*n^2 - 3).

Table of values

List of values

cp's OEIS Frontend

A367967 a(n) = 3/4*(3^(n + 1) - 2*n - 4*n^2 - 3).

Table of values

List of values

A367967 a(n) = 3/4(3^(n + 1) - 2n - 4*n^2 - 3).