OFFSET
2,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 2..50
StackExchange, How many arrays with crossed cells, order of rows/columns irrelevant, Dec 13 2013
MAPLE
Using the uploaded program the call is seq(matrix_marks(n, 2), n=3..15);
PROG
(PARI) \\ See A304942 for Blocks
a(n) = Blocks(n, n, 2); \\ Andrew Howroyd, May 24 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Marko Riedel, Sep 21 2014
EXTENSIONS
Terms a(17) and beyond from Andrew Howroyd, May 23 2018
STATUS
approved