a(n) = A068346(A276086(n)), where A068346 is the second arithmetic derivative, and A276086 is the primorial base exp-function.
A370131
a(n) = A068346(A276086(n)), where A068346 is the second arithmetic derivative, and A276086 is the primorial base exp-function.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =5a(5) =10a(6) =0a(7) =1a(8) =12a(9) =1a(10) =16a(11) =44a(12) =7a(13) =39a(14) =16a(15) =42a(16) =608a(17) =391a(18) =55a(19) =135a(20) =365a(21) =455a(22) =1120a(23) =2990a(24) =800a(25) =1100a(26) =1400a(27) =5425a(28) =12575a(29) =21025
External references
- oeis: A370131