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 A180010 Triangle T(n,k) read by rows. Matrix inverse of A180009. 1
 1, -1, -1, -1, 0, -1, 0, 0, 0, -1, -1, 1, -1, 0, -1, 1, -2, 2, -1, 0, -1, -1, 4, -3, 1, -1, 0, -1, 0, -6, 4, -2, 1, -1, 0, -1, 0, 11, -6, 4, -3, 1, -1, 0, -1, 1, -21, 12, -7, 5, -3, 1, -1, 0, -1, -1, 35, -21, 11, -7, 4, -3, 1, -1, 0, -1, 0, -56, 34, -19, 11, -6, 4, -3, 1, -1, 0, -1, -1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,17 COMMENTS First column is mu(n). It could perhaps be said that the Mobius function is an invariant under the modified divisibility recurrence together with matrix inversion. LINKS EXAMPLE Table begins: 1, -1,-1, -1,0,-1, 0,0,0,-1, -1,1,-1,0,-1, 1,-2,2,-1,0,-1, -1,4,-3,1,-1,0,-1, 0,-6,4,-2,1,-1,0,-1, 0,11,-6,4,-3,1,-1,0,-1, 1,-21,12,-7,5,-3,1,-1,0,-1, -1,35,-21,11,-7,4,-3,1,-1,0,-1, 0,-56,34,-19,11,-6,4,-3,1,-1,0,-1, -1,100,-59,35,-21,11,-7,4,-3,1,-1,0,-1, CROSSREFS Cf. A180009, A008683. Sequence in context: A060572 A163543 A180009 * A287401 A003406 A226289 Adjacent sequences:  A180007 A180008 A180009 * A180011 A180012 A180013 KEYWORD sign,tabl AUTHOR Mats Granvik, Aug 06 2010 STATUS approved

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Last modified February 22 12:33 EST 2020. Contains 332136 sequences. (Running on oeis4.)