A300943 - OEIS

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A300943 as a simple table

n	a(n)
1	21
2	11
3	101
4	530
5	2975
6	16587
7	99717
8	628078
9	4085574
10	26803581
11	176672818
12	1167853353
13	7727739359
14	51133275030
15	338411771448
16	2240013488296
17	14827127102453
18	98143499126149
19	649628272106039
20	4299947674444031

[21,11,101,530,2975,16587,99717,628078,4085574, 26803581,176672818,1167853353,7727739359, 51133275030,338411771448,2240013488296, 14827127102453,98143499126149,649628272106039, 4299947674444031]