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A025240 as a simple table

na(n)
13
22
36
422
590
6394
71806
88558
941586
10206098
111037718
125293446
1327297738
14142078746
15745387038
163937603038
1720927156706
18111818026018
19600318853926
203236724317174
2117518619320890
2295149655201962
23518431875418926
242832923350929742

[3,2,6,22,90,394,1806,8558,41586,206098,1037718,
 5293446,27297738,142078746,745387038,3937603038,
 20927156706,111818026018,600318853926,
 3236724317174,17518619320890,95149655201962,
 518431875418926,2832923350929742]