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A251900 as a simple table

na(n)
13312
21586
31536
42772
56408
610662
716848
835992
968496
10124364
11245836
12470306
13910476
141826136
153521588
166889776
1713879176
1827307258
1953819940
20107870152
21214245840
22425563680
23851234568
241695933986
253381382444
266763588448

[3312,1586,1536,2772,6408,10662,16848,35992,68496,
 124364,245836,470306,910476,1826136,3521588,
 6889776,13879176,27307258,53819940,107870152,
 214245840,425563680,851234568,1695933986,
 3381382444,6763588448]