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A011951 as a simple table

na(n)
52
63
79
816
939
1075
11165
12318
13672
141323
152703
165376
1710880
1821663
1943605
2087040
21174564
22348843
23698709
241396680
252795518

[2,3,9,16,39,75,165,318,672,1323,2703,5376,10880,
 21663,43605,87040,174564,348843,698709,1396680,
 2795518]