A109949 - OEIS

A109949

Smallest prime == 1 (mod f(n)), where f(n) = concatenation 1,2,3...,n-1,n,n-1,...,3,2,1.

%I #4 Dec 05 2013 19:57:01

%S 2,727,147853,7405927,3456720989,24691308643,34567894320989,

%T 8888888711111113,518518517481481483,271604936041728395063,

%U 3703703673033329629629631,22222222038200179997777777779

%N Smallest prime == 1 (mod f(n)), where f(n) = concatenation 1,2,3...,n-1,n,n-1,...,3,2,1.

%Y Cf. A109947, A109948, A108963.

%K base,nonn

%O 1,1

%A _Amarnath Murthy_, Jul 20 2005

%E More terms from _Erich Friedman_, Aug 08 2005