|
| |
|
|
A061194
|
|
Minimum positive value of LCM{1,...,n}*(s_1/1 + ... + s_n/n), where each s_i equals 1 or -1.
|
|
1
| |
|
|
1, 1, 1, 1, 7, 3, 11, 13, 11, 11, 23, 23, 607, 251, 251, 125, 97, 97, 3767, 3767, 3767, 2285
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,5
|
|
|
COMMENTS
| Nonnegative by considering the largest power of 2 up to n
|
|
|
EXAMPLE
| 1/1 - 1/2 - 1/3 - 1/4 - 1/5 + 1/6 + 1/7 = 11/420 = 11/LCM[1,2,3,4,5,6,7], so a(7)<=11; no other choice of signs yields 1/420, ..., 10/420, so a(7)=11.
|
|
|
CROSSREFS
| See also A061195.
Sequence in context: A168197 A138859 A076569 * A073337 A195159 A200943
Adjacent sequences: A061191 A061192 A061193 * A061195 A061196 A061197
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Greg Martin (gerg(AT)math.toronto.edu), Apr 19 2001
|
|
|
EXTENSIONS
| More terms from Naohiro Nomoto (6284968128(AT)geocities.co.jp), Jun 24 2001
|
| |
|
|
