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A111139 as a simple table

na(n)
00
11
23
311
447
5240
61448
710149
881213
9730951
107309565
1180405304
12964863792
1312543229529
14175605213783
152634078207355
1642145251318667
17716469272418936
1812896446903543432
19245032491167329389
204900649823346594545

[0,1,3,11,47,240,1448,10149,81213,730951,7309565,
 80405304,964863792,12543229529,175605213783,
 2634078207355,42145251318667,716469272418936,
 12896446903543432,245032491167329389,
 4900649823346594545]