A288384 a(n) is the n-th term of the leading column of the right triangle in A274650 minus n.

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

Offset

0,10

Comments

It appears that this sequence has infinitely many negative terms, infinitely many zeros and infinitely many positive terms.

Links

Table of n, a(n) for n=0..104.

Formula

a(n) = A274650(n,0) - n = A286294(n) - n, n >= 0.

Mathematica

(* function a286294[] is defined in A286294 using A274651 *)
a288384[n_] := a286294[n] - Range[0, n]
a288384[104] (* data *) (* Hartmut F. W. Hoft, Jun 13 2017 *)

Crossrefs

Inspired by A286294.

Partial sums give A288424.

Cf. A274650, A274651.

Sequence in context: A141664 A056979 A087812 * A113045 A309365 A204179

Adjacent sequences: A288381 A288382 A288383 * A288385 A288386 A288387

Keyword

sign

Author

Omar E. Pol, Jun 08 2017

Extensions

Signs reversed at the suggestion of Hartmut F. W. Hoft and edited by Omar E. Pol, Jun 13 2017

Status

approved