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A180220 as a simple table

na(n)
1284
21494
34418
49982
516350
627206
741801
860217
9136301
10203293
11274438
12362071
13450801
14574956
15714771
16837923
17991099
181159829
191336165
201517013
211720445
221922889
232287973
242677897
253108299
263507891
273963235
284449413
294964149
305490064
316159752

[284,1494,4418,9982,16350,27206,41801,60217,
 136301,203293,274438,362071,450801,574956,714771,
 837923,991099,1159829,1336165,1517013,1720445,
 1922889,2287973,2677897,3108299,3507891,3963235,
 4449413,4964149,5490064,6159752]