Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A074462
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A074462 Average digit (rounded up) in the decimal expansion of a prime number. +0
2
2, 3, 5, 7, 1, 2, 4, 5, 3, 6, 2, 5, 3, 4, 6, 4, 7, 4, 7, 4, 5, 8, 6, 9, 8, 1, 2, 3, 4, 2, 4, 2, 4, 5, 5, 3, 5, 4, 5, 4, 6, 4, 4, 5, 6, 7, 2, 3, 4, 5, 3, 5, 3, 3, 5, 4, 6, 4, 6, 4, 5, 5, 4, 2, 3, 4, 3, 5, 5, 6, 4, 6, 6, 5, 7, 5, 7, 7, 2, 5, 5, 3, 3, 4, 6, 4, 6, 6, 4, 5, 6, 7, 7, 5, 8, 3, 5, 3, 4, 4, 6, 6, 5, 7, 5, 7, 7, 6, 8, 3, 5, 4, 5, 6, 4, 4, 5, 6, 5, 7 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n)=ceil(A007605(n)/A097944(n)). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 23 2008

EXAMPLE

prime numbers: 2,3,5,7,11,13,17,19,23... so the average digits rounded up are; 2, 3, 5, 7, (1+1)/2=1, (1+3)/2=2, (1+7)/2=4, (1+9)/2=5,ceiling((2+3)/2)=3...

CROSSREFS

Cf. A000040, A074461, A073342.

Sequence in context: A117819 A074461 A073342 this_sequence A113656 A007652 A060418

Adjacent sequences: A074459 A074460 A074461 this_sequence A074463 A074464 A074465

KEYWORD

easy,nonn,base

AUTHOR

Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 23 2002

EXTENSIONS

Changed offset to 1, added cf to A073342 and extended. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 23 2008

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