Sum of the prime factors of k equals half the sum of the prime factors of k + 1.

Terms

a(0) =90a(1) =208a(2) =867a(3) =1161a(4) =1674a(5) =2139a(6) =2295a(7) =2821a(8) =3683a(9) =9675a(10) =10374a(11) =11357a(12) =14823a(13) =17685a(14) =20436a(15) =23750a(16) =23895a(17) =28035a(18) =39039a(19) =39962a(20) =43687a(21) =43813a(22) =47564a(23) =63624a(24) =75615a(25) =79281a(26) =97382a(27) =100855a(28) =103246a(29) =119350