Numbers n such that 2*reversal(n)=sigma(n).

Terms

a(0) =6a(1) =73a(2) =483a(3) =4074a(4) =4473a(5) =4623a(6) =7993a(7) =42813a(8) =69855a(9) =253782a(10) =799993a(11) =7999993a(12) =46000023a(13) =426000213a(14) =4600000023a(15) =6718967838a(16) =42600000213a(17) =46000000023a(18) =79999999993a(19) =426000000213