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A253737 as a simple table

na(n)
122236
225012
344332
4143080
5400068
61059528
73230352
810458356
931345596
1090751832
11283521828
12902287168
132744697232
148179125776
1525412894924
1679521551136
17243350008716
18735182296720
192274754523660
207051147684380

[22236,25012,44332,143080,400068,1059528,3230352,
 10458356,31345596,90751832,283521828,902287168,
 2744697232,8179125776,25412894924,79521551136,
 243350008716,735182296720,2274754523660,
 7051147684380]