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!)
A076162 Primes p such that p + sum of squares of digits of p is also prime. 7
11, 13, 17, 19, 31, 73, 97, 101, 103, 107, 109, 127, 251, 277, 347, 367, 431, 433, 457, 499, 613, 631, 677, 691, 701, 709, 727, 811, 877, 941, 947, 1009, 1063, 1069, 1087, 1171, 1229, 1283, 1289, 1399, 1423, 1429, 1531, 1553, 1597, 1607, 1621, 1667, 1669, 1733 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

EXAMPLE

13 is OK because 13+(1^2+3^2)=23 is a prime.

MATHEMATICA

Select[Prime[Range[2, 300]], PrimeQ[#+Total[IntegerDigits[#]^2]]&] (* Vincenzo Librandi, Apr 13 2013 *)

CROSSREFS

Sequence in context: A106101 A032590 A181576 * A156902 A050674 A164329

Adjacent sequences:  A076159 A076160 A076161 * A076163 A076164 A076165

KEYWORD

nonn,base

AUTHOR

Zak Seidov, Nov 01 2002

EXTENSIONS

More terms from Vincenzo Librandi, Apr 13 2013

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 10 03:38 EDT 2022. Contains 356029 sequences. (Running on oeis4.)