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A025957 as a simple table

na(n)
01
128
2531
38582
4127505
51800456
624581887
7327729514
84292988909
955478507084
10709331302043
118991457539246
12113171793119113
131416078851325712
1417631136903084599
15218593740438932978

[1,28,531,8582,127505,1800456,24581887,327729514,
 4292988909,55478507084,709331302043,8991457539246,
 113171793119113,1416078851325712,
 17631136903084599,218593740438932978]