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A214001 as a simple table

na(n)
10
21
3909
42055
511925
6145881
7191079
8254199
9358875
10490215
11614241
12642105
13648261
14689655
15864159
16959595
171030911
181047585
191056981
201150335
211366971
221406571
231669845
241746525
252299485
262357751
272491809
282494329
292629869
302876859
313162159
323220041
333257595

[0,1,909,2055,11925,145881,191079,254199,358875,
 490215,614241,642105,648261,689655,864159,959595,
 1030911,1047585,1056981,1150335,1366971,1406571,
 1669845,1746525,2299485,2357751,2491809,2494329,
 2629869,2876859,3162159,3220041,3257595]