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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A067779 Primes such that the sum of the squares of its digits is equal to the product of its digits. 0
 11353, 13513, 15313, 15331, 31153, 31513, 31531, 33151, 35311, 51133, 53113, 1125221, 1212251, 1212521, 1221251, 1252211, 1512221, 2115221, 2122151, 2122511, 2151221, 2152211, 2215211, 2221511, 2251121, 2251211, 5122121 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE An eight-digit term is 11224121, a ten-digit term is 1111111843. 11353 belongs to the sequence because 1^2+1^2+3^2+5^2+3^2=45=1*1*3*5*3 PROG (PARI) forprime(p=2, 6e6, n=p; sd=0; pd=1; while(n>0, d=divrem(n, 10); n=d[1]; sd=sd+d[2]*d[2]; pd=pd*d[2]); if(sd==pd, print1(p, ", "))) CROSSREFS Sequence in context: A179917 A287245 A067791 * A202377 A210122 A251957 Adjacent sequences:  A067776 A067777 A067778 * A067780 A067781 A067782 KEYWORD easy,nonn,base AUTHOR Felice Russo, Feb 06 2002 EXTENSIONS Edited and extended by Klaus Brockhaus Feb 11 2002 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.

Last modified January 27 11:59 EST 2021. Contains 340465 sequences. (Running on oeis4.)