Least nonnegative number whose n-th arithmetic derivative (A003415) is zero and lower derivatives are nonzero.

A189760

Least nonnegative number whose n-th arithmetic derivative (A003415) is zero and lower derivatives are nonzero.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =6a(4) =9a(5) =14a(6) =33a(7) =62a(8) =177a(9) =414a(10) =1155a(11) =1719a(12) =2625a(13) =4018a(14) =6849a(15) =9770a(16) =17675a(17) =30206a(18) =90609a(19) =260343a(20) =336006a(21) =757995a(22) =1290874a(23) =2029875a(24) =4059746a(25) =7037655a(26) =17594075a(27) =50850483a(28) =68589598a(29) =186888243

External references