|
| |
|
|
A074461
|
|
Average digit (rounded down) in the decimal expansion of a prime number.
|
|
3
| |
|
|
2, 3, 5, 7, 1, 2, 4, 5, 2, 5, 2, 5, 2, 3, 5, 4, 7, 3, 6, 4
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
COMMENTS
| a(n) = A004426(A000040(n)). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 27 2010]
|
|
|
EXAMPLE
| prime numbers: 2,3,5,7,11,13,17,19,23... so the average digits rounded down are; 2, 3, 5, 7, (1+1)/2=1, (1+3)/2=2, (1+7)/2=4, (1+9)/2=5,floor((2+3)/2)=2...
|
|
|
CROSSREFS
| Cf. A000040.
Sequence in context: A134690 A065859 A117819 * A073342 A074462 A113656
Adjacent sequences: A074458 A074459 A074460 * A074462 A074463 A074464
|
|
|
KEYWORD
| easy,nonn,base
|
|
|
AUTHOR
| Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 23 2002
|
| |
|
|
