Beginning with 3, least member of A007500 such that concatenation of first n terms and its digit reversal both are primes.

A111383

Beginning with 3, least member of A007500 such that concatenation of first n terms and its digit reversal both are primes.

Terms

    a(0) =3a(1) =7a(2) =3a(3) =3a(4) =79a(5) =701a(6) =157a(7) =1103a(8) =11959a(9) =1901a(10) =10273a(11) =92753a(12) =17047a(13) =11909a(14) =144973a(15) =327251a(16) =99289a(17) =92831a(18) =90373a(19) =309671a(20) =1149619a(21) =745397a(22) =1232083a(23) =94793a(24) =18481a(25) =76607a(26) =186649a(27) =181421a(28) =1657561a(29) =3746111

External references