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A063849 Numbers k such that mu(k) + mu(k+1) + mu(k+2) = 1. 1
8, 13, 21, 24, 25, 26, 37, 44, 49, 50, 54, 57, 62, 63, 74, 75, 80, 90, 115, 116, 119, 120, 123, 134, 146, 157, 160, 175, 177, 185, 187, 206, 207, 209, 224, 234, 248, 253, 259, 260, 265, 274, 278, 287, 294, 295, 296, 304, 314, 321, 323, 324, 329, 332, 338, 340 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
PROG
(PARI) m(n)=moebius(n)+moebius(n+1)+moebius(n+2);
j=[]; for(n=1, 1000, if(m(n)==1, 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)==1, write("b063849.txt", n++, " ", m); if (n==1000, break)) ) } \\ Harry J. Smith, Sep 01 2009
CROSSREFS
Cf. A063838.
Sequence in context: A176209 A227453 A266212 * A273980 A101642 A269354
KEYWORD
easy,nonn
AUTHOR
Jason Earls, Aug 26 2001
STATUS
approved

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Last modified May 21 15:14 EDT 2024. Contains 372738 sequences. (Running on oeis4.)