a(n) is the least m > 0 such that sigma(m) - 2m = A140863(n).

Terms

a(0) =18a(1) =196a(2) =100a(3) =36a(4) =15376a(5) =162a(6) =1352a(7) =72a(8) =968a(9) =200a(10) =392a(11) =13456a(12) =144a(13) =8450a(14) =1032256a(15) =400a(16) =119072a(17) =324a(18) =8464a(19) =288a(20) =1936a(21) =5776a(22) =2704a(23) =4624a(24) =111392a(25) =450a(26) =800a(27) =1458a(28) =9604a(29) =2450