[go: up one dir, main page]
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A088712 Primes which when concatenated with the previous prime form a new prime. 3
5, 53, 59, 67, 137, 179, 211, 223, 239, 263, 359, 541, 593, 613, 631, 653, 659, 757, 809, 977, 997, 1009, 1109, 1129, 1237, 1399, 1559, 1783, 1931, 1979, 1993, 2309, 2339, 2347, 2411, 2683, 2879, 3061, 3203, 3271, 3613, 3643, 3767, 4001 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..44.
FORMULA
If isprime(p(n) & p(n-1)) then sequence.add(p(n))
EXAMPLE
a(2) = 53 because 53 concatenated with the preceding prime (47) yields 5347 which is also prime.
CROSSREFS
Cf. A088784.
Sequence in context: A216459 A107803 A255579 * A257667 A045711 A090153
Adjacent sequences: A088709 A088710 A088711 * A088713 A088714 A088715
KEYWORD
base,nonn
AUTHOR
Chuck Seggelin (barkeep(AT)plasteredDragon.com), Oct 15 2003
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 30 09:19 EDT 2024. Contains 375532 sequences. (Running on oeis4.)