Number of distinct values that can be generated by an expression containing n binary operators (any of add, subtract, multiply and divide) whose operands are any integer between 1 and 9; parenthesis allowed.
A181958
Number of distinct values that can be generated by an expression containing n binary operators (any of add, subtract, multiply and divide) whose operands are any integer between 1 and 9; parenthesis allowed.
Terms
- a(0) =9a(1) =93a(2) =931a(3) =11644a(4) =126436a(5) =1443224
External references
- oeis: A181958