Triangle: row n is least sequence of n positive integers such that A131655(n) distinct rational numbers are generated only from them using only +, -, * and / and each number in the row no more than once in a given expression.
A133568
Triangle: row n is least sequence of n positive integers such that A131655(n) distinct rational numbers are generated only from them using only +, -, * and / and each number in the row no more than once in a given expression.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =2a(4) =5a(5) =22a(6) =2a(7) =5a(8) =22a(9) =309a(10) =2a(11) =5a(12) =22a(13) =309a(14) =10431
External references
- oeis: A133568