The next prime greater than the square root of 10^n.

Terms

a(0) =2a(1) =5a(2) =11a(3) =37a(4) =101a(5) =317a(6) =1009a(7) =3163a(8) =10007a(9) =31627a(10) =100003a(11) =316241a(12) =1000003a(13) =3162283a(14) =10000019a(15) =31622777a(16) =100000007a(17) =316227767a(18) =1000000007a(19) =3162277669a(20) =10000000019a(21) =31622776621a(22) =100000000003a(23) =316227766069