Numbers k for which k = phi(k') + phi(k''), where phi is the Euler totient function (A000010), k' the arithmetic derivative of k (A003415) and k'' the second arithmetic derivative of k (A068346).
A352332
Numbers k for which k = phi(k') + phi(k''), where phi is the Euler totient function (A000010), k' the arithmetic derivative of k (A003415) and k'' the second arithmetic derivative of k (A068346).
Terms
- a(0) =4a(1) =260a(2) =294a(3) =740a(4) =1460a(5) =3140a(6) =3860a(7) =5540a(8) =8420a(9) =10820a(10) =15140a(11) =19940a(12) =21860a(13) =24020a(14) =24260a(15) =27620a(16) =37460a(17) =40340a(18) =46820a(19) =49460a(20) =55940a(21) =61220a(22) =70340a(23) =85460a(24) =101540a(25) =114020a(26) =124340a(27) =132740a(28) =133220a(29) =144260
External references
- oeis: A352332