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A251891 as a simple table

na(n)
11534
2594
31260
41958
53530
66072
711762
821346
939202
1080834
11147842
12276162
13593666
141091074
152059522
164537346
178361986
1815877122
1935450882
2065429506
21124620802
22280215554
23517570562
24987381762
252228158466
264117102594

[1534,594,1260,1958,3530,6072,11762,21346,39202,
 80834,147842,276162,593666,1091074,2059522,
 4537346,8361986,15877122,35450882,65429506,
 124620802,280215554,517570562,987381762,
 2228158466,4117102594]