OFFSET
0,2
PROG
(PARI) \\ See A318951 for RowSumMats
a(n)=RowSumMats(n, 3*n, 3); \\ Andrew Howroyd, Sep 06 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladeta Jovovic, Nov 27 2000
EXTENSIONS
a(11)-a(20) from Andrew Howroyd, Sep 06 2018
STATUS
approved