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A003891 as a simple table

na(n)
11
215
315
430
530
630
730
830
930
1030
1131
1232
1332
1432
1532
1632
1732
1832

[1,15,15,30,30,30,30,30,30,30,31,32,32,32,32,32,
 32,32]