A092155 First differences of A092673.

-3, 1, 2, -2, 3, -3, 1, 0, 2, -3, 0, 0, 3, -1, -1, -1, 1, -1, 0, 2, 1, -3, 1, 0, 2, -2, -1, 0, -1, 1, 1, 1, 1, -1, -1, -1, 3, -1, -1, -1, -1, 1, 0, 1, 2, -3, 1, 0, 0, 1, -2, 0, 1, 1, -1, 1, 1, -3, 2, -2, 3, -2, 0, 1, -3, 1, 0, 2, -3, 1, 1, -1, 3, -2, -1, 2, -3, 1, 1, 0, 2, -3, 2, 0, 1, -1, -1, -1, 1, 1, -2, 2, 1, -1, -1, -1, 1, 0, 0, -1, -1, 1, 1, -1, 3

Offset

1,1

Comments

Empirical: For n > 1, letting M(n) denote the n X n matrix whereby the (i,j)-entry of M(n) is -Sum_{k=1..j} floor(i/k), we have that the first n-1 entries in the first column of the inverse of M(n) are a(1) through a(n-1). - John M. Campbell, Aug 30 2017

John Campbell's empirical data is proved at the Mathematics Stack Exchange link. - Sungjin Kim, Jul 17 2019

Links

Table of n, a(n) for n=1..105.

Mathematics Stack Exchange, What is the inverse of ... ?

Crossrefs

Cf. A092673.

Sequence in context: A161916 A072548 A079399 * A288725 A029336 A211939

Adjacent sequences: A092152 A092153 A092154 * A092156 A092157 A092158

Keyword

sign

Author

Jon Perry, Mar 31 2004

Status

approved