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A007823 as a simple table

na(n)
01
12
25
314
445
5186
6945
75778
844037
9403470
104344877
1156072378
12793804721
1312734185106
14229632768005
154628786367502
16105803768420397
172626282179198138
1871539181027191729
192076395667668755090
2065704452165048754181

[1,2,5,14,45,186,945,5778,44037,403470,4344877,
 56072378,793804721,12734185106,229632768005,
 4628786367502,105803768420397,2626282179198138,
 71539181027191729,2076395667668755090,
 65704452165048754181]