|
| |
|
|
A063838
|
|
Numbers n such that mu(n) + mu(n+1) + mu(n+2) = 3.
|
|
10
| |
|
|
33, 85, 93, 141, 201, 213, 217, 301, 393, 445, 633, 697, 869, 921, 1041, 1137, 1189, 1253, 1261, 1345, 1401, 1589, 1641, 1761, 1793, 1837, 1893, 1937, 1941, 1981, 2045, 2101, 2181, 2189, 2217, 2305, 2361, 2433, 2461, 2469, 2489, 2517, 2561, 2641, 2721
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
REFERENCES
| I. Niven and H. S. Zuckerman, An Introduction to the Theory of Numbers. 4th ed., Wiley, NY, 1980, p. 113.
|
|
|
LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
|
|
|
MATHEMATICA
| Transpose[ Select[ Partition[ Range[ 3000 ], 3, 1 ], MoebiusMu[ #[ [ 1 ] ] ]+MoebiusMu[ #[ [ 2 ] ] ]+MoebiusMu[ #[ [ 3 ] ] ]==3& ] ][ [ 1 ] ]
|
|
|
PROG
| (PARI) M(n) = moebius(n)+moebius(n+1)+moebius(n+2); j=[]; for(n=1, 5000, if(M(n)==3, j=concat(j, n))); j
(PARI) M(n) = moebius(n) + moebius(n + 1) + moebius(n + 2) { n=0; for (m=1, 10^9, if(M(m)==3, write("b063838.txt", n++, " ", m); if (n==1000, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 01 2009]
|
|
|
CROSSREFS
| Cf. A008683. A proper subset of A007675.
Sequence in context: A073251 A005238 A052214 * A075039 A039833 A080700
Adjacent sequences: A063835 A063836 A063837 * A063839 A063840 A063841
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Aug 21 2001
|
| |
|
|
