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A237645 as a simple table

na(n)
01
11
22
37
434
5201
61357
710109
881397
9698948
106341597
1160391832
12600661215
136215862360
1466726103981
15741259084280
168504902411004
17100618874020119
181225724374602147
1915356200178917791
20197646961110310062
212610956607315266757
2235370366025297098315

[1,1,2,7,34,201,1357,10109,81397,698948,6341597,
 60391832,600661215,6215862360,66726103981,
 741259084280,8504902411004,100618874020119,
 1225724374602147,15356200178917791,
 197646961110310062,2610956607315266757,
 35370366025297098315]