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A231311 as a simple table

na(n)
157
2937
318334
4352610
56781436
6130633288
72516212586
848467679482
9933608055112
1017983615795542
11346409439393284
126672714054969582
13128533200257770904
142475871681865298784
1547691495995570845668

[57,937,18334,352610,6781436,130633288,2516212586,
 48467679482,933608055112,17983615795542,
 346409439393284,6672714054969582,
 128533200257770904,2475871681865298784,
 47691495995570845668]