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Table read by antidiagonals: T(n,m) = lcm(n,m) (n >= 0, m >= 0).
12

%I #12 Mar 07 2018 05:55:26

%S 0,0,0,0,1,0,0,2,2,0,0,3,2,3,0,0,4,6,6,4,0,0,5,4,3,4,5,0,0,6,10,12,12,

%T 10,6,0,0,7,6,15,4,15,6,7,0,0,8,14,6,20,20,6,14,8,0,0,9,8,21,12,5,12,

%U 21,8,9,0,0,10,18,24,28,30,30,28,24,18,10,0,0,11,10,9,8,35,6,35,8,9,10,11,0

%N Table read by antidiagonals: T(n,m) = lcm(n,m) (n >= 0, m >= 0).

%H Alois P. Heinz, <a href="/A109042/b109042.txt">Antidiagonals n = 0..140, flattened</a>

%F lcm(n, m) = n*m/gcd(n, m).

%Y Rows A000027, A109043, A109044, A109045, A109046, A109047, A109048, A109049, A109050, A109051, A109052, A109053.

%Y A003990 is (1, 1) based.

%K nonn,easy,tabl

%O 0,8

%A _Mitch Harris_, Jun 18 2005