OFFSET
1,2
EXAMPLE
a(2) = -2 = |1 2|
|3 4|.
a(3) = 4 = |1 2 3|
|4 5 7|
|8 9 11|.
CROSSREFS
KEYWORD
easy,sign
AUTHOR
Jonathan Vos Post, May 27 2006
EXTENSIONS
More terms from Hugo Pfoertner, Sep 13 2024
STATUS
approved