A140508 - OEIS

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A140508

Mobius transform applied twice to A001414.

0, 2, 3, 0, 5, -5, 7, 0, 0, -7, 11, 0, 13, -9, -8, 0, 17, 0, 19, 0, -10, -13, 23, 0, 0, -15, 0, 0, 29, 10, 31, 0, -14, -19, -12, 0, 37, -21, -16, 0, 41, 12, 43, 0, 0, -25, 47, 0, 0, 0, -20, 0, 53, 0, -16, 0, -22, -31, 59, 0, 61, -33, 0, 0, -18, 16, 67, 0, -26, 14, 71, 0, 73

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OFFSET

1,2

COMMENTS

Mobius transform applied once to A120007. Except for first term and zero divided by zero, this sequence gives A008683 as:

mu(n) = -a(n)/abs(a(n)) through the conjecture in A140254.

LINKS

Table of n, a(n) for n=1..73.

CROSSREFS

Cf. A120007, A001414, A008683, A140254.

Sequence in context: A167485 A294141 A265513 * A063956 A351078 A128214

Adjacent sequences: A140505 A140506 A140507 * A140509 A140510 A140511

KEYWORD

sign

AUTHOR

Mats Granvik, Jun 30 2008

STATUS

approved