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!)
A088755 Number of n-digit primes beginning with n. 5
0, 2, 16, 119, 924, 7445, 63129, 547572, 4838319, 4814936, 43167234, 391378851, 3580266494, 32997926272, 306051434210, 2853931339135, 26737370196938, 251515351394258, 2374493400086829, 22488661383368556, 213597279448646179, 2033961812788210675, 19413250431142245897 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
This is a subsidiary sequence suggested in A088104.
LINKS
EXAMPLE
a(2) = 2 since 23 and 29 are the only two 2-digit primes beginning with 2.
CROSSREFS
Sequence in context: A288964 A193289 A159324 * A136782 A112710 A046105
KEYWORD
nonn,base
AUTHOR
Ray Chandler, Oct 15 2003
EXTENSIONS
More terms from Harvey P. Dale, Oct 16 2003
a(10)-a(13) corrected and a(14)-a(22) from Donovan Johnson, Apr 24 2013
Incorrect Mathematica program deleted by Harvey P. Dale, Apr 25 2013
a(23) from Chai Wah Wu, Jun 20 2019
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 February 22 18:10 EST 2024. Contains 370260 sequences. (Running on oeis4.)