A082967 - OEIS

A082967

Numbers n such that mu(n) + mu(n+1) + mu(n+2) + mu(n+3) + mu(n+4) + mu(n+5) + mu(n+6) = 6.

213, 1937, 3093, 3097, 4529, 6401, 7165, 9753, 9933, 10117, 10541, 10577, 11301, 13385, 15005, 18641, 18829, 18965, 25089, 34413, 36285, 37833, 37909, 38157, 38405, 38409, 38413, 39529, 40461, 42981, 44457, 46577, 48741, 51365, 55477

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OFFSET

1,1

COMMENTS

The terms up to 18965 were first given by Ignacio Larrosa Cañestro in a thread entitled "Seven consecutive numbers" in the newsgroup sci.math on Apr 29 2003. - Hugo Pfoertner, Aug 26 2006

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

Ignacio Larrosa Cañestro, Seven consecutive numbers. Posting in newsgroup sci.math, Apr 29 2003.

MATHEMATICA

Position[Partition[MoebiusMu[Range[60000]], 7, 1], _?(Total[#] == 6&), 1, Heads->False]//Flatten (* Harvey P. Dale, Jan 23 2019 *)

PROG

(PARI) isok(n) = moebius(n) + moebius(n+1) + moebius(n+2) + moebius(n+3) + moebius(n+4) + moebius(n+5) + moebius(n+6) == 6 \\ Michel Marcus, Aug 06 2013

CROSSREFS

Cf. A070268, A063838, A008683.

Sequence in context: A252024 A302256 A092127 * A212312 A201342 A092796

Adjacent sequences: A082964 A082965 A082966 * A082968 A082969 A082970

KEYWORD

nonn

AUTHOR

Yuval Dekel (dekelyuval(AT)hotmail.com), May 27 2003

EXTENSIONS

More terms from Rick L. Shepherd, May 28 2003

STATUS

approved