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A057585 as a simple table

na(n)
10
21
34
416
556
6190
7624
82014
96412
1020219
1163284
12196938
13610052
141882717
155792528
1617776102
1754433100
18166374109
19507710420
201547195902
214709218604
2214318240578
2343493134160
24132003957436
25400337992056
261213314272395
273674980475284
2811124919273160

[0,1,4,16,56,190,624,2014,6412,20219,63284,196938,
 610052,1882717,5792528,17776102,54433100,
 166374109,507710420,1547195902,4709218604,
 14318240578,43493134160,132003957436,400337992056,
 1213314272395,3674980475284,11124919273160]