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A045505 as a simple table

na(n)
01
121
2262
32525
420754
5152946
61040556
76659037
840599130
9237978598
101350216660
117453221490
1240188242420
13212349718980
141102352779992
155634083759325
1628400234400810
17141402315307550
18696257439473860

[1,21,262,2525,20754,152946,1040556,6659037,
 40599130,237978598,1350216660,7453221490,
 40188242420,212349718980,1102352779992,
 5634083759325,28400234400810,141402315307550,
 696257439473860]