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 A127510 Triangle T(n,k) = k*mobius(n). 2
 1, -1, -2, -1, -2, -3, 0, 0, 0, 0, -1, -2, -3, -4, -5, 1, 2, 3, 4, 5, 6, -1, -2, -3, -4, -5, -6, -7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 LINKS FORMULA T(n,k) = A008683(n)*k. EXAMPLE First few rows of the triangle are: 1; -1, -2; -1, -2, -3; 0, 0, 0, 0; -1, -2, -3, -4, -5; 1, 2, 3, 4, 5, 6; ... MAPLE A127510 := proc(n, k)     numtheory[mobius](n)*k ; end proc: # R. J. Mathar, Sep 08 2013 CROSSREFS Cf. A008683, A000217, A125287 (row sums). Sequence in context: A092186 A138262 A276990 * A328362 A158810 A129391 Adjacent sequences:  A127507 A127508 A127509 * A127511 A127512 A127513 KEYWORD tabl,easy,sign AUTHOR Gary W. Adamson, Jan 17 2007 STATUS approved

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Last modified February 19 09:57 EST 2020. Contains 332041 sequences. (Running on oeis4.)