Primes that are the concatenation of k and k-1 for some k, where the concatenation of k-2 and k-3 is also prime.
A156120
Primes that are the concatenation of k and k-1 for some k, where the concatenation of k-2 and k-3 is also prime.
Terms
- a(0) =2423a(1) =102101a(2) =114113a(3) =210209a(4) =264263a(5) =270269a(6) =330329a(7) =342341a(8) =414413a(9) =762761a(10) =774773a(11) =840839a(12) =852851a(13) =912911a(14) =10021001a(15) =11101109a(16) =17641763a(17) =20222021a(18) =21302129a(19) =22322231a(20) =26822681a(21) =27242723a(22) =28322831a(23) =32523251a(24) =36723671
External references
- oeis: A156120