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A076703 as a simple table

na(n)
14
28
39
4121
5343
61331
710201
894249
91030301
10900075181570009
1110022212521222001
1212124434743442121
1312323244744232321
1412341234943214321

[4,8,9,121,343,1331,10201,94249,1030301,
 900075181570009,10022212521222001,
 12124434743442121,12323244744232321,
 12341234943214321]