|
Search: id:A001682
|
|
|
| A001682 |
|
Numbers n such that 3^n, 3^(n+1) and 3^(n+2) have same number of digits.
(Formerly M5109 N2213)
|
|
+0
2
|
|
| 0, 21, 42, 65, 86, 109, 130, 151, 174, 195, 218, 239, 262, 283, 304, 327, 348, 371, 392, 415, 436, 457, 480, 501, 524, 545, 568, 589, 610, 633, 654, 677, 698, 721, 742, 763, 786, 807, 830, 851, 874, 895, 916, 939, 960, 983, 1004, 1027, 1048
(list; graph; listen)
|
|
|
OFFSET
|
1,2
|
|
|
COMMENT
|
Equivalently the fractional part of n*log(3) lies between 0 and 1-2log(3), about .04576; 1-2log(3) is also the density of the sequence. - Kevin Costello Aug 08 2002
|
|
REFERENCES
|
Murray Klamkin and Joe Lipman, Problem E1238, Amer. Math. Monthly, 64 (1957), 367.
|
|
CROSSREFS
|
Sequence in context: A114384 A008603 A086794 this_sequence A078440 A039344 A043167
Adjacent sequences: A001679 A001680 A001681 this_sequence A001683 A001684 A001685
|
|
KEYWORD
|
nonn,base,easy,nice
|
|
AUTHOR
|
njas
|
|
EXTENSIONS
|
More terms from R. K. Guy and Emeric Deutsch, Mar 09 2005
|
|
|
Search completed in 0.002 seconds
|
