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A041891 as a simple table

na(n)
01
11
22
33
45
518
659
71257
83830
912747
1016577
1129324
1245901
1375225
143205351
153280576
166485927
179766503
1816252430
1958523793
20191823809
214086823782
2212452295155
2341443709247
2453896004402
2595339713649
26149235718051
27244575431700
2810421403849451
2910665979281151

[1,1,2,3,5,18,59,1257,3830,12747,16577,29324,
 45901,75225,3205351,3280576,6485927,9766503,
 16252430,58523793,191823809,4086823782,
 12452295155,41443709247,53896004402,95339713649,
 149235718051,244575431700,10421403849451,
 10665979281151]