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A189390 as a simple table

na(n)
00
11
25
316
445
5116
6286
7680
81581
93604
108106
1118008
1239650
1386568
14187804
15404944
16868989
171856180
183950194
198376056
2017708310
2137329016
2278499620
23164682416
24344789970
25720430216
261502768996
273129355120
286507087396
2913510929104

[0,1,5,16,45,116,286,680,1581,3604,8106,18008,
 39650,86568,187804,404944,868989,1856180,3950194,
 8376056,17708310,37329016,78499620,164682416,
 344789970,720430216,1502768996,3129355120,
 6507087396,13510929104]