A307795 - OEIS

A307795 as a simple table

n	a(n)
0	1
1	2
2	4
3	6
4	10
5	16
6	26
7	42
8	70
9	116
10	196
11	332
12	572
13	996
14	1758
15	3134
16	5650
17	10276
18	18836
19	34720
20	64310
21	119582
22	223066
23	417028
24	780876
25	1463800
26	2746304
27	5155556
28	9682418
29	18189458
30	34178904
31	64236714
32	120749592
33	227018306
34	426886298
35	802872340
36	1510325700

[1,2,4,6,10,16,26,42,70,116,196,332,572,996,1758, 3134,5650,10276,18836,34720,64310,119582,223066, 417028,780876,1463800,2746304,5155556,9682418, 18189458,34178904,64236714,120749592,227018306, 426886298,802872340,1510325700]