|
Search: id:A074464
|
|
|
| A074464 |
|
Average digit (rounded down) in the decimal expansion of a prime number p, where 2^p-1 is a Mersenne prime. |
|
+0
2
|
|
| 2, 3, 5, 7, 2, 4, 5, 2, 3, 8, 2, 3, 2, 4, 4, 1, 3, 3, 3, 3
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
EXAMPLE
|
prime numbers for Mersenne: 2,3,5,7,13,17,19,31,61 so the average digits rounded down are; 2, 3, 5, 7, (1+3)/2=2, (1+7)/2=4, (1+9)/2=5, (3+1)/2=2,floor((6+1)/2)=3...
|
|
CROSSREFS
|
Cf. A000043, A074463..
Sequence in context: A104212 A139751 A076779 this_sequence A074463 A038194 A111309
Adjacent sequences: A074461 A074462 A074463 this_sequence A074465 A074466 A074467
|
|
KEYWORD
|
easy,nonn,base
|
|
AUTHOR
|
Y. Kelly Itakura (yitkr(AT)mta.ca), Aug 23 2002
|
|
|
Search completed in 0.002 seconds
|
