A141015 - cp's OEIS frontend

A141015 a(0) = 0, a(1) = 1, a(2) = 2; for n > 2, a(n) = a(n-1) + 2*a(n-2) + a(n-3).

n	a(n)
0	0
1	1
2	2
3	4
4	9
5	19
6	41
7	88
8	189
9	406
10	872
11	1873
12	4023
13	8641
14	18560
15	39865
16	85626
17	183916
18	395033
19	848491
20	1822473
21	3914488
22	8407925
23	18059374
24	38789712
25	83316385
26	178955183
27	384377665
28	825604416
29	1773314929
30	3808901426

[0, 1, 2, 4, 9, 19, 41, 88, 189, 406, 872, 1873, 4023, 8641, 18560, 39865, 85626, 183916, 395033, 848491, 1822473, 3914488, 8407925, 18059374, 38789712, 83316385, 178955183, 384377665, 825604416, 1773314929, 3808901426]

cp's OEIS Frontend

A141015 a(0) = 0, a(1) = 1, a(2) = 2; for n > 2, a(n) = a(n-1) + 2*a(n-2) + a(n-3).

Table of values

List of values