Smallest k such that (10^n+k, 10^n+k+2) and (10^(n+1)+k, 10^(n+1)+k+2) are two pairs of twin primes.

A224905

Smallest k such that (10^n+k, 10^n+k+2) and (10^(n+1)+k, 10^(n+1)+k+2) are two pairs of twin primes.

Terms

    a(0) =1a(1) =49a(2) =91a(3) =1117a(4) =2929a(5) =721a(6) =1819a(7) =37237a(8) =30979a(9) =30967a(10) =29629a(11) =6457a(12) =53269a(13) =27727a(14) =271159a(15) =556651a(16) =190489a(17) =62797a(18) =105259a(19) =784777a(20) =290659a(21) =1320829a(22) =438037a(23) =1019317a(24) =333991a(25) =248371a(26) =226609a(27) =671227a(28) =384571a(29) =1573537

External references