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A299193 as a simple table

na(n)
121
2203
3129
42466
525097
680188
7848789
88080772
944495267
10401953734
113543442090
1225212181714
13216188808140
141850221884503
1514678677380641
16124620964817279
171059123538097555
188784723556861615
1974638466920690089

[21,203,129,2466,25097,80188,848789,8080772,
 44495267,401953734,3543442090,25212181714,
 216188808140,1850221884503,14678677380641,
 124620964817279,1059123538097555,8784723556861615,
 74638466920690089]