Numbers k such that sopfr(k) = sopfr(k + sopfr(k)).

Terms

a(0) =39a(1) =60a(2) =70a(3) =95a(4) =119a(5) =240a(6) =2079a(7) =2130a(8) =2183a(9) =3000a(10) =3125a(11) =3431a(12) =4250a(13) =6293a(14) =6468a(15) =9310a(16) =10164a(17) =10241a(18) =10679a(19) =13433a(20) =14039a(21) =14111a(22) =15561a(23) =16199a(24) =16799a(25) =23552a(26) =24601a(27) =27004a(28) =28116a(29) =28560