Least m such that n = m mod tau(m) if such m exists, otherwise 0.

Terms

a(0) =3a(1) =6a(2) =15a(3) =28a(4) =165a(5) =30a(6) =135a(7) =48a(8) =144a(9) =192a(10) =1755a(11) =300a(12) =1485a(13) =270a(14) =2079a(15) =336a(16) =6237a(17) =1008a(18) =9639a(19) =1728a(20) =1296a(21) =3510a(22) =28215a(23) =1080a(24) =16900a(25) =2970a(26) =10395a(27) =7840a(28) =12285a(29) =4158