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!)
A201965 Primes of the form identical digits preceded by a 10. 1
101, 103, 107, 109, 1033, 10111, 10333, 101111, 103333, 107777, 10333333, 101111111, 103333333, 1033333333, 10999999999, 101111111111, 1099999999999, 10333333333333, 101111111111111111, 1099999999999999999, 10333333333333333333 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..37

MATHEMATICA

Select[FromDigits/@Flatten[Table[PadRight[{10}, i, #]&/@{1, 2, 3, 4, 5, 6, 7, 8, 9}, {i, 2, 200}], 1], PrimeQ[#]&]

CROSSREFS

Sequence in context: A119680 A329737 A166571 * A318157 A117837 A176929

Adjacent sequences:  A201962 A201963 A201964 * A201966 A201967 A201968

KEYWORD

nonn,base,less

AUTHOR

Vincenzo Librandi, Dec 10 2011

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 August 14 04:13 EDT 2020. Contains 336477 sequences. (Running on oeis4.)