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A220727 as a simple table

na(n)
11
24
330
4230
51819
614466
7114900
8913187
97256380
1057664692
11458236178
123641435760
1328937067889
14229951848995
151827338913535
1614521161884614
17115394100670410
18916992651769082
197286988782183320
2057906904219355630

[1,4,30,230,1819,14466,114900,913187,7256380,
 57664692,458236178,3641435760,28937067889,
 229951848995,1827338913535,14521161884614,
 115394100670410,916992651769082,7286988782183320,
 57906904219355630]