Primes whose decimal expansion contains only 3's and 4's, in which every 4 is preceded and followed by a 3.
A270338
Primes whose decimal expansion contains only 3's and 4's, in which every 4 is preceded and followed by a 3.
Terms
- a(0) =3343a(1) =3433a(2) =33343a(3) =333433a(4) =334333a(5) =343333a(6) =343433a(7) =3333433a(8) =3343343a(9) =3343433a(10) =3433333a(11) =34333333a(12) =333334333a(13) =333343343a(14) =333343433a(15) =333433343a(16) =333434333a(17) =334334333a(18) =3333334343a(19) =3333433343a(20) =3334333333a(21) =3343334333a(22) =3343434343a(23) =3433434343a(24) =3434343433a(25) =33333333343
External references
- oeis: A270338