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A041487 as a simple table

na(n)
01
18
2257
32064
466305
5532504
617106433
7137383968
84413393409
935444531240
101138638393089
119144551675952
12293764292023553
132359258887864376
1475790048703683585
15608679648517333056
1619553538801258341377
17157036990058584064072
185044737220675948391681

[1,8,257,2064,66305,532504,17106433,137383968,
 4413393409,35444531240,1138638393089,
 9144551675952,293764292023553,2359258887864376,
 75790048703683585,608679648517333056,
 19553538801258341377,157036990058584064072,
 5044737220675948391681]