The largest nontrivial divisor of n equals the sum of the other nontrivial divisors of n.

Terms

a(0) =345a(1) =1645a(2) =6489a(3) =8041a(4) =23881a(5) =88473a(6) =115957a(7) =342637a(8) =3256261a(9) =4114285a(10) =4646101a(11) =5054221a(12) =13384681a(13) =17897737a(14) =20901553a(15) =23807821a(16) =42081409a(17) =64580041a(18) =65380921a(19) =70366153a(20) =82175857a(21) =110344621a(22) =137331565a(23) =164109901a(24) =286078081a(25) =331957897a(26) =366611617a(27) =367891717a(28) =489645157