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A218728 as a simple table

na(n)
00
11
226
3651
416276
5406901
610172526
7254313151
86357828776
9158945719401
103973642985026
1199341074625651
122483526865641276
1362088171641031901
141552204291025797526
1538805107275644938151
16970127681891123453776
1724253192047278086344401
18606329801181952158610026

[0,1,26,651,16276,406901,10172526,254313151,
 6357828776,158945719401,3973642985026,
 99341074625651,2483526865641276,62088171641031901,
 1552204291025797526,38805107275644938151,
 970127681891123453776,24253192047278086344401,
 606329801181952158610026]