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A277247 as a simple table

na(n)
01
11
25
310
453
5126
6662
71716
88885
924310
10124130
11352716
121778966
135200300
1425947612
1577558760
16383358645
171166803110
185719519850
1917672631900
2085990654178
21269128937220
221300866635172
234116715363800
2419780031677718
2563205303218876
26302045506654052

[1,1,5,10,53,126,662,1716,8885,24310,124130,
 352716,1778966,5200300,25947612,77558760,
 383358645,1166803110,5719519850,17672631900,
 85990654178,269128937220,1300866635172,
 4116715363800,19780031677718,63205303218876,
 302045506654052]