n-th Payam number E_{-}(n), defined as the smallest positive odd integer k such that for every positive integer m, the number k*2^m-1 is not divisible by any primes p such that the multiplicative order of 2 mod p is less than or equal to n.

A083391

n-th Payam number E_{-}(n), defined as the smallest positive odd integer k such that for every positive integer m, the number k*2^m-1 is not divisible by any primes p such that the multiplicative order of 2 mod p is less than or equal to n.