A206475 First differences of A206369.

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

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: A352533 A215905 A269065 * A227184 A124911 A132954

Adjacent sequences: A206472 A206473 A206474 * A206476 A206477 A206478

Keyword

sign

Author

Reinhard Zumkeller, Feb 08 2012

Status

approved