Primes that can be written in binary representation as concatenation of two primes: p and p-2. That is, primes representable as p * 2^L + p-2, where p and p-2 are primes, and L is the length of binary representation of p-2: L = A070939(p-2).
A232235
Primes that can be written in binary representation as concatenation of two primes: p and p-2. That is, primes representable as p * 2^L + p-2, where p and p-2 are primes, and L is the length of binary representation of p-2: L = A070939(p-2).
Terms
- a(0) =23a(1) =61a(2) =1021a(3) =139021a(4) =145177a(5) =222127a(6) =2645257a(7) =2706727a(8) =2928019a(9) =3050959a(10) =3997597a(11) =38695537a(12) =45086077a(13) =49903561a(14) =50247667a(15) =53688727a(16) =56294101a(17) =545636617a(18) =556450387a(19) =558023299a(20) =563331877a(21) =563921719a(22) =581616979a(23) =582993277a(24) =607570027a(25) =619956709a(26) =638045197a(27) =660262579
External references
- oeis: A232235