A181432 Symmetric square array T(n,k) read by antidiagonals. T(n,k)=A008836(n)*A008836(k).

1, -1, -1, -1, 1, -1, 1, 1, 1, 1, -1, -1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, 1, -1, -1, -1, -1, 1, -1, 1, -1, -1, -1, -1, 1, 1, 1, -1, -1, -1, -1, -1, 1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, 1, 1, -1

Offset

1,1

Links

Table of n, a(n) for n=1..83.

Example

Array starts:
1,-1,-1,1,-1,1, ...
-1,1,1,-1,1,-1, ...
-1,1,1,-1,1,-1, ...
1,-1,-1,1,-1,1, ...
-1,1,1,-1,1,-1, ...
1,-1,-1,1,-1,1, ...

Crossrefs

Cf. A008836.

Sequence in context: A014077 A174351 A339265 * A165326 A143621 A292117

Adjacent sequences: A181429 A181430 A181431 * A181433 A181434 A181435

Keyword

sign,tabl

Author

Mats Granvik, Oct 20 2010

Status

approved