A378362 - OEIS

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A378362 as a simple table

n	a(n)
1	6
2	10
3	24
4	68
5	198
6	594
7	1816
8	5650
9	17824
10	56836
11	182788
12	592060
13	1929676
14	6323418
15	20819284
16	68828316
17	228372578
18	760188362
19	2537770576
20	8494004948

[6,10,24,68,198,594,1816,5650,17824,56836,182788, 592060,1929676,6323418,20819284,68828316, 228372578,760188362,2537770576,8494004948]