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A153581 as a simple table

na(n)
1721801
28646121
310403641
422885129
536307981
642702661
746094401
848064021
952204237
1079398901
1180918281
1281954133
13114329881
14116151661
15143168581
16170782921
17188985961
18217145881
19220531501
20282707461
21299671921
22303373801
23326695141
24353815801
25361307521

[721801,8646121,10403641,22885129,36307981,
 42702661,46094401,48064021,52204237,79398901,
 80918281,81954133,114329881,116151661,143168581,
 170782921,188985961,217145881,220531501,282707461,
 299671921,303373801,326695141,353815801,361307521]