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A316639 as a simple table

na(n)
15
2333
31344
49773
585222
6684269
75879970
850360206
9428319949
103674375963
1131500882914
12269759007869
132312231101195
1419820061601337
15169853073919389
161455814567670817
1712477915004284634
18106944514066842361

[5,333,1344,9773,85222,684269,5879970,50360206,
 428319949,3674375963,31500882914,269759007869,
 2312231101195,19820061601337,169853073919389,
 1455814567670817,12477915004284634,
 106944514066842361]