OFFSET
0,2
COMMENTS
This is similar to A141414 but applied to negative numbers. It is the greatest negative number that requires an n step SLP (Stright Line Program) to compute it.
EXAMPLE
For n=1 the value is -1 since -1 requires 2 steps SLP: 1,2,-1.
For n=2 the value is -2 since -2 requires 3 steps SLP: 1,2,3,-2.
For n=3 the value is -4 since -3 also requires only 3 steps but -4 requires 4: 1,2,4,5,-4.
CROSSREFS
KEYWORD
sign,hard
AUTHOR
Gil Dogon, Sep 27 2013
STATUS
approved