A098790 - cp's OEIS frontend

A098790 a(n) = 2*a(n-1) + a(n-2) + 1, a(0) = 1, a(1) = 2.

n	a(n)
0	1
1	2
2	6
3	15
4	37
5	90
6	218
7	527
8	1273
9	3074
10	7422
11	17919
12	43261
13	104442
14	252146
15	608735
16	1469617
17	3547970
18	8565558
19	20679087
20	49923733
21	120526554
22	290976842
23	702480239
24	1695937321
25	4094354882
26	9884647086
27	23863649055
28	57611945197

[1, 2, 6, 15, 37, 90, 218, 527, 1273, 3074, 7422, 17919, 43261, 104442, 252146, 608735, 1469617, 3547970, 8565558, 20679087, 49923733, 120526554, 290976842, 702480239, 1695937321, 4094354882, 9884647086, 23863649055, 57611945197]

cp's OEIS Frontend

A098790 a(n) = 2*a(n-1) + a(n-2) + 1, a(0) = 1, a(1) = 2.

Table of values

List of values