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Triangle read by rows: T(n,k) = (n-k+1)*n, n>=1, 1<=k<=n.
4

%I #7 Dec 08 2015 08:51:18

%S 1,4,2,9,6,3,16,12,8,4,25,20,15,10,5,36,30,24,18,12,6,49,42,35,28,21,

%T 14,7,64,56,48,40,32,24,16,8,81,72,63,54,45,36,27,18,9,100,90,80,70,

%U 60,50,40,30,20,10,121,110,99,88,77,66,55,44,33,22,11,144,132,120,108,96,84

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

%e 1

%e 4 2

%e 9 6 3

%e 16 12 8 4

%e 25 20 15 10 5

%e 36 30 24 18 12 6

%e 49 42 35 28 21 14 7

%e 64 56 48 40 32 24 16 8

%Y Cf. A002411 (row sums).

%K easy,nonn,tabl

%O 1,2

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