Least number of Sort-then-add persistence n.

Terms

a(0) =0a(1) =10a(2) =65a(3) =64a(4) =175a(5) =98a(6) =240a(7) =325a(8) =302a(9) =387a(10) =198a(11) =180a(12) =550a(13) =806a(14) =855a(15) =486a(16) =351a(17) =315a(18) =944a(19) =2428a(20) =2204a(21) =3172a(22) =1793a(23) =1316a(24) =937a(25) =2775a(26) =1815a(27) =1461a(28) =2541a(29) =9378