Smallest number m such that first digit - second digit + third digit - fourth digit ... (of m) = n.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =9a(10) =109a(11) =209a(12) =309a(13) =409a(14) =509a(15) =609a(16) =709a(17) =809a(18) =909a(19) =10909a(20) =20909a(21) =30909a(22) =40909a(23) =50909a(24) =60909a(25) =70909a(26) =80909a(27) =90909a(28) =1090909a(29) =2090909