A200054 - OEIS

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A200054 as a simple table

n	a(n)
1	1
2	10
3	56
4	324
5	1948
6	11962
7	74338
8	466548
9	2947742
10	18746754
11	119701782
12	767860824
13	4938868628
14	31876070432
15	206122332340
16	1336425077996
17	8676994345132
18	56457974059982
19	367738443114696
20	2399500033305708

[1,10,56,324,1948,11962,74338,466548,2947742, 18746754,119701782,767860824,4938868628, 31876070432,206122332340,1336425077996, 8676994345132,56457974059982,367738443114696, 2399500033305708]