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A225978 as a simple table

na(n)
115
2138
31178
49113
561808
6361361
71825607
88065278
931631401
10111785599
11360788468
121075829429
132993017696
147832960008
1519417916324
1645865067963
17103734768130
18225619306783
19473616394498
20962612525277
211899542726132

[15,138,1178,9113,61808,361361,1825607,8065278,
 31631401,111785599,360788468,1075829429,
 2993017696,7832960008,19417916324,45865067963,
 103734768130,225619306783,473616394498,
 962612525277,1899542726132]