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A277461 as a simple table

na(n)
00
11
22
311
4104
51241
618216
7317715
86414848
9147107953
103776164000
11107253230171
123339157316736
13113070818225353
144137170839854976
15162653198951193059
166837934005096620032
17306093463368534049761
1814535589272368159900160
19729835620496621069643179

[0,1,2,11,104,1241,18216,317715,6414848,147107953,
 3776164000,107253230171,3339157316736,
 113070818225353,4137170839854976,
 162653198951193059,6837934005096620032,
 306093463368534049761,14535589272368159900160,
 729835620496621069643179]