A050868 - OEIS

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A050868 as a simple table

n	a(n)
1	4
2	10
3	12
4	22
5	24
6	34
7	48
8	60
9	100
10	562
11	574
12	640
13	838
14	852
15	2002
16	4198
17	4932
18	5860
19	10492
20	13834
21	17398
22	25944
23	133030
24	179992

[4,10,12,22,24,34,48,60,100,562,574,640,838,852, 2002,4198,4932,5860,10492,13834,17398,25944, 133030,179992]