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A015440 as a simple table

na(n)
01
11
26
311
441
596
6301
7781
82286
96191
1017621
1148576
12136681
13379561
141062966
152960771
168275601
1723079456
1864457461
19179854741
20502142046
211401415751
223912125981
2310919204736
2430479834641
2585075858321
26237475031526

[1,1,6,11,41,96,301,781,2286,6191,17621,48576,
 136681,379561,1062966,2960771,8275601,23079456,
 64457461,179854741,502142046,1401415751,
 3912125981,10919204736,30479834641,85075858321,
 237475031526]