A344903 - OEIS

A344903 as a simple table

n	a(n)
3	4
4	2
5	2
6	2
7	6
8	10
9	22
10	42
11	86
12	166
13	338
14	666
15	1342
16	2662
17	5346
18	10650
19	21342
20	42598
21	85282
22	170398
23	340962
24	681586
25	1363510
26	2726354
27	5453374
28	10905406
29	21812154
30	43621646
31	87245954
32	174486562
33	348978470
34	697946290
35	1395903230
36	2791785118
37	5583591578
38	11167140558

[4,2,2,2,6,10,22,42,86,166,338,666,1342,2662,5346, 10650,21342,42598,85282,170398,340962,681586, 1363510,2726354,5453374,10905406,21812154, 43621646,87245954,174486562,348978470,697946290, 1395903230,2791785118,5583591578,11167140558]