login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A108832 Primes such that the outer 2 digits are n and n-1 and all inner digits are 3, where 0 < n < 9. 0
433, 43333333333333333, 43333333333333333333333333333333, 43333333333333333333333333333333333333, 43333333333333333333333333333333333333333333333333333333 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

This sequence has only 4 and 3 as the outer digits since all other combinations are divisible by 2,3 or 5. This fact makes the sequence coincide with A093673 except for the first term.

LINKS

Table of n, a(n) for n=1..5.

PROG

(PARI) n10np1(n, d) = { local(x, y, k); for(x=1, n, for(k=1, 8, y=10^(x+1)*k+floor(10^x*d/9)*10+k-1; if(isprime(y), print1(y", ")) ) ) }

CROSSREFS

Cf. A093673.

Sequence in context: A289857 A198450 A241925 * A055009 A054982 A108785

Adjacent sequences:  A108829 A108830 A108831 * A108833 A108834 A108835

KEYWORD

easy,nonn,base

AUTHOR

Cino Hilliard, Jul 11 2005

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 17 12:55 EDT 2021. Contains 343971 sequences. (Running on oeis4.)