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A020005 as a simple table

na(n)
01
11
22
35
420
597
6573
73956
831285
9278721
102761871
1130129503
12358814994
134631975383
1464426566695
15960541539816
1615281342678897
17258393612570435
184627594697852333
1987503608832116847
201742117303112144502

[1,1,2,5,20,97,573,3956,31285,278721,2761871,
 30129503,358814994,4631975383,64426566695,
 960541539816,15281342678897,258393612570435,
 4627594697852333,87503608832116847,
 1742117303112144502]