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A141357 as a simple table

na(n)
01
11
25
355
4945
521961
6645013
722948815
8959764865
946147888945
102508384505221
11152103283527559
1210179988876061425
13745421842821798585
1459279676127816345685
155087948349956406532831
16468789320770224531664257

[1,1,5,55,945,21961,645013,22948815,959764865,
 46147888945,2508384505221,152103283527559,
 10179988876061425,745421842821798585,
 59279676127816345685,5087948349956406532831,
 468789320770224531664257]