A102841 - cp's OEIS frontend

A102841 a(n) = ((9n^2 + 33n + 26)*2^n + (-1)^n)/27.

n	a(n)
0	1
1	5
2	19
3	61
4	179
5	493
6	1299
7	3309
8	8211
9	19949
10	47635
11	112109
12	260627
13	599533
14	1366547
15	3089901
16	6937107
17	15476205
18	34331155
19	75769325
20	166451731
21	364127725
22	793500179
23	1723082221
24	3729512979
25	8048092653
26	17319057939

[1, 5, 19, 61, 179, 493, 1299, 3309, 8211, 19949, 47635, 112109, 260627, 599533, 1366547, 3089901, 6937107, 15476205, 34331155, 75769325, 166451731, 364127725, 793500179, 1723082221, 3729512979, 8048092653, 17319057939]

cp's OEIS Frontend

A102841 a(n) = ((9n^2 + 33n + 26)*2^n + (-1)^n)/27.

Table of values

List of values

cp's OEIS Frontend

A102841 a(n) = ((9*n^2 + 33*n + 26)*2^n + (-1)^n)/27.

Table of values

List of values

A102841 a(n) = ((9n^2 + 33n + 26)*2^n + (-1)^n)/27.