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A251677 as a simple table

na(n)
1953
22089
35527
416467
554523
6184139
7632811
82196747
97647815
1026675183
1193098207
12325011115
131135034003
143964108395
1513844422191
1648352496787
17168877391803
18589827645215
192060055442119
207195028701059
2125129660932207

[953,2089,5527,16467,54523,184139,632811,2196747,
 7647815,26675183,93098207,325011115,1135034003,
 3964108395,13844422191,48352496787,168877391803,
 589827645215,2060055442119,7195028701059,
 25129660932207]