The first primorial based variant of arithmetic derivative: a(prime(i)) = A002110(i-1), where prime(i) = A000040(i), a(u*v) = a(u)*v + u*a(v), with a(0) = a(1) = 0.

A328768

The first primorial based variant of arithmetic derivative: a(prime(i)) = A002110(i-1), where prime(i) = A000040(i), a(u*v) = a(u)*v + u*a(v), with a(0) = a(1) = 0.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =2a(4) =4a(5) =6a(6) =7a(7) =30a(8) =12a(9) =12a(10) =17a(11) =210a(12) =20a(13) =2310a(14) =67a(15) =28a(16) =32a(17) =30030a(18) =33a(19) =510510a(20) =44a(21) =104a(22) =431a(23) =9699690a(24) =52a(25) =60a(26) =4633a(27) =54a(28) =148a(29) =223092870

External references