A141695 Triangle T(n,m) = A120070(n,m)-A143814(n,m) read by rows, 1<=m<n.

0, 3, -3, 3, 5, -8, 3, 5, 7, -15, 3, 5, 7, 9, -24, 3, 5, 7, 9, 11, -35, 3, 5, 7, 9, 11, 13, -48, 3, 5, 7, 9, 11, 13, 15, -63, 3, 5, 7, 9, 11, 13, 15, 17, -80, 3, 5, 7, 9, 11, 13, 15, 17, 19, -99, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, -120

Offset

2,2

Comments

Row sums are sum_{1<=m<n} T(n,m)=0.

Links

Table of n, a(n) for n=2..67.

Formula

T(n,n-1) = -A005563(n-2).

T(n,m) = 2*m+1, m<n-1.

Example

0
3 -3
3 5 -8
3 5 7 -15
3 5 7 9 -24
3 5 7 9 11 -35
3 5 7 9 11 13 -48
3 5 7 9 11 13 15 -63
3 5 7 9 11 13 15 17 -80

Crossrefs

Sequence in context: A346476 A307446 A122519 * A358452 A261450 A100026

Adjacent sequences: A141692 A141693 A141694 * A141696 A141697 A141698

Keyword

sign,easy,tabl

Author

Paul Curtz, Sep 11 2008

Status

approved