A041818 - OEIS

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A041818 as a simple table

n	a(n)
0	20
1	21
2	62
3	83
4	311
5	394
6	2675
7	21794
8	133439
9	155233
10	599138
11	754371
12	2107880
13	2862251
14	116597920
15	119460171
16	355518262
17	474978433
18	1780453561
19	2255431994
20	15313045525
21	124759796194
22	763871822689

[20,21,62,83,311,394,2675,21794,133439,155233, 599138,754371,2107880,2862251,116597920,119460171, 355518262,474978433,1780453561,2255431994, 15313045525,124759796194,763871822689]