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A057857 as a simple table

na(n)
01
12
24
311
452
5485
65766
792167
81658888
936495369
101021870090
1130656102411
121103619686412
1344144787456013
141854081073152014
1585287729364992015
164434961926979584016
17257227791764815872017
1815433667505888952320018

[1,2,4,11,52,485,5766,92167,1658888,36495369,
 1021870090,30656102411,1103619686412,
 44144787456013,1854081073152014,85287729364992015,
 4434961926979584016,257227791764815872017,
 15433667505888952320018]