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A207721 as a simple table

na(n)
122
2484
35302
466946
5820820
610150118
7125165018
81545006848
919064074106
10235267721766
112903258039792
1235827609743354
13442126584439650
145456029684316684
1567329644638468630
16830875800786510138

[22,484,5302,66946,820820,10150118,125165018,
 1545006848,19064074106,235267721766,2903258039792,
 35827609743354,442126584439650,5456029684316684,
 67329644638468630,830875800786510138]