A048052 Start of the first occurrence of n consecutive reversible primes (emirps).

2, 2, 2, 2, 2, 2, 2, 727, 1193, 1193, 1477271183, 9387802769, 15423094826093

Offset

1,1

Comments

Palindromic primes are allowed.

Links

Table of n, a(n) for n=1..13.

Carlos Rivera, Problem 17. The largest known sequence of consecutive and reversible primes, Problems and Puzzles.

Example

2, 3, 5, 7, 11, 13 and 17 are consecutive reversible primes, so a(7) = 2.

Crossrefs

Cf. A040104 (n=10), A048051 (n=11), A048053 (n=12), A003684, A006567, A007628, A046732, A048054, A048895.

Sequence in context: A291721 A109913 A197169 * A184156 A187785 A238277

Adjacent sequences: A048049 A048050 A048051 * A048053 A048054 A048055

Keyword

base,nonn,more

Author

Jud McCranie

Extensions

Corrected by Rick L. Shepherd, May 28 2002

a(13) from Giovanni Resta, Nov 07 2019

Status

approved