a(n) = 10^(2*n - 1) + 1.A152577a(n) = 10^(2*n - 1) + 1.Terms a(0) =11a(1) =1001a(2) =100001a(3) =10000001a(4) =1000000001a(5) =100000000001External referencesoeis: A152577