Numbers that yield a prime when prime(k+2) is inserted after the k-th digit (or prime(1) = 2 before the 1st digit for k=0), for 0 <= k <= number of digits.
A304243
Numbers that yield a prime when prime(k+2) is inserted after the k-th digit (or prime(1) = 2 before the 1st digit for k=0), for 0 <= k <= number of digits.
Terms
- a(0) =27a(1) =33a(2) =39a(3) =57a(4) =93a(5) =333a(6) =3747a(7) =5073a(8) =5997a(9) =7239a(10) =10053a(11) =22419a(12) =349731a(13) =425991a(14) =714807a(15) =1719279a(16) =81453303a(17) =406253439a(18) =481683189a(19) =886662423a(20) =2653294371
External references
- oeis: A304243