Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A052430
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A052430 Numbers n such that sum of digits and product of digits are both prime. +0
1
2, 3, 5, 7, 12, 21, 113, 115, 131, 151, 311, 511, 1112, 1121, 1211, 2111, 11113, 11117, 11131, 11171, 11311, 11711, 13111, 17111, 31111, 71111, 111112, 111121, 111211, 112111, 121111, 211111, 1111115, 1111117, 1111151, 1111171, 1111511, 1111711 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(7)=115 because 1+1+5=7 which is prime and 1*1*5=5 which is prime

CROSSREFS

Cf. A000040, A028834, A028842.

Sequence in context: A048818 A062713 A086108 this_sequence A024784 A060528 A117593

Adjacent sequences: A052427 A052428 A052429 this_sequence A052431 A052432 A052433

KEYWORD

base,nonn

AUTHOR

Henry Bottomley (se16(AT)btinternet.com), Mar 14 2000

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


AT&T Labs Research