Least number k = concat(x,y) such that k = n*x*y - x - y, -1 if such a number does not exist.
A278935
Least number k = concat(x,y) such that k = n*x*y - x - y, -1 if such a number does not exist.
Terms
- a(0) =126a(1) =84a(2) =63a(3) =3231a(4) =42a(5) =4154a(6) =2143a(7) =1143a(8) =4105263158a(10) =21a(11) =11a(12) =2077a(13) =1077a(14) =18063a(15) =1206a(16) =16056a(17) =105882353a(18) =2052631579a(19) =43304763a(21) =8044a(22) =12042a(23) =30411a(24) =6039a(25) =5037593985a(27) =5035a(28) =14033492823a(29) =3033
External references
- oeis: A278935