a(n) = least value of k such that tau(k) = A000594(k) == n mod 23.

Terms

a(0) =4a(1) =1a(2) =59a(3) =3481a(4) =5959a(5) =12117361a(6) =351581a(7) =344322938a(8) =995153a(9) =35509681a(10) =1223853461a(11) =117428054a(12) =58714027a(13) =2447706922a(14) =71019362a(15) =1990306a(16) =172161469a(17) =703162a(18) =24234722a(19) =11918a(20) =6962a(21) =118a(22) =2