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A251461 as a simple table

na(n)
1168
2738
33142
411134
538509
6120982
7373380
81094071
93155436
108863194
1124492702
1266982908
13179947523
14483592878
151274228592
163384152417
178795160858
1823166886746
1959604866106
20156072942342
21398500362769
221038849541150

[168,738,3142,11134,38509,120982,373380,1094071,
 3155436,8863194,24492702,66982908,179947523,
 483592878,1274228592,3384152417,8795160858,
 23166886746,59604866106,156072942342,398500362769,
 1038849541150]