A298347 - cp's OEIS frontend

A298347 a(n) = a(n-1) + a(n-2) + 2 a([n/2]), where a(0) = 1, a(1) = 2, a(2) = 3.

n	a(n)
0	1
1	2
2	3
3	9
4	18
5	33
6	69
7	120
8	225
9	381
10	672
11	1119
12	1929
13	3186
14	5355
15	8781
16	14586
17	23817
18	39165
19	63744
20	104253
21	169341
22	275832
23	447411
24	727101
25	1178370
26	1911843
27	3096585
28	5019138
29	8126433
30	13163133
31	21307128
32	34499433
33	55835733
34	90382800
35	146266167
36	236727297

[1, 2, 3, 9, 18, 33, 69, 120, 225, 381, 672, 1119, 1929, 3186, 5355, 8781, 14586, 23817, 39165, 63744, 104253, 169341, 275832, 447411, 727101, 1178370, 1911843, 3096585, 5019138, 8126433, 13163133, 21307128, 34499433, 55835733, 90382800, 146266167, 236727297]

cp's OEIS Frontend

A298347 a(n) = a(n-1) + a(n-2) + 2 a([n/2]), where a(0) = 1, a(1) = 2, a(2) = 3.

Table of values

List of values