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A206475 First differences of A206369. 3
0, 1, 1, 1, -2, 4, -1, 2, -3, 6, -4, 6, -6, 2, 3, 5, -9, 11, -6, 0, -2, 12, -12, 11, -9, 8, -2, 10, -20, 22, -9, -1, -4, 8, -3, 15, -18, 6, -4, 20, -28, 30, -12, -2, -6, 24, -24, 21, -22, 11, 4, 16, -32, 20, -10, 6, -8, 30, -34, 36, -30, 12, 1, 5, -28, 46 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

a(A206368(n)) = 0.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

FORMULA

a(n) = A206369(n+1) - A206369(n).

MATHEMATICA

(* b = A206369 *) b[n_] := n*DivisorSum[n, LiouvilleLambda[#]/# &];

Array[b, 100] // Differences (* Jean-François Alcover, Dec 04 2017 *)

PROG

(Haskell)

a206475 n = a206475_list !! (n-1)

a206475_list = zipWith (-) (tail a206369_list) a206369_list

CROSSREFS

Sequence in context: A053450 A215905 A269065 * A227184 A124911 A132954

Adjacent sequences:  A206472 A206473 A206474 * A206476 A206477 A206478

KEYWORD

sign

AUTHOR

Reinhard Zumkeller, Feb 08 2012

STATUS

approved

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Last modified June 2 07:15 EDT 2020. Contains 334767 sequences. (Running on oeis4.)