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A260499 as a simple table

na(n)
11600
22115
35219
49616
513651
631078
767993
8103520
9205769
10478636
11814781
121474039
133329758
146280086
1511053808
1623440140
1746913222
1884184848
19168447589
20344315004
21638782384
221233316423
232511417269
244802082633
259139233197

[1600,2115,5219,9616,13651,31078,67993,103520,
 205769,478636,814781,1474039,3329758,6280086,
 11053808,23440140,46913222,84184848,168447589,
 344315004,638782384,1233316423,2511417269,
 4802082633,9139233197]