OFFSET
1,1
EXAMPLE
7*5 - 3 - 1 = 31
11*7 - 5 - 1 = 71
11*7 - 5 + 1 = 73
13*11 - 7 + 1 = 137
CROSSREFS
KEYWORD
nonn
AUTHOR
Martin Michael Musatov, Sep 14 2018
STATUS
approved