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Triangle read by rows: T(n,k) = (n-k)*n, n>=1, 1<=k<=n.
0

%I #4 Dec 08 2015 08:51:13

%S 0,2,0,6,3,0,12,8,4,0,20,15,10,5,0,30,24,18,12,6,0,42,35,28,21,14,7,0,

%T 56,48,40,32,24,16,8,0,72,63,54,45,36,27,18,9,0,90,80,70,60,50,40,30,

%U 20,10,0,110,99,88,77,66,55,44,33,22,11,0,132,120,108,96,84,72,60,48,36,24

%N Triangle read by rows: T(n,k) = (n-k)*n, n>=1, 1<=k<=n.

%e 0

%e 2 0

%e 6 3 0

%e 12 8 4 0

%e 20 15 10 5 0

%e 30 24 18 12 6 0

%e 42 35 28 21 14 7 0

%e 56 48 40 32 24 16 8 0

%Y Cf. A006002 (row sums).

%K easy,nonn,tabl

%O 1,2

%A Herman Jamke (hermanjamke(AT)fastmail.fm), Jul 10 2004