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Triangle read by rows: T(n,k) = (n-k+1)*(n-k), n>=1, 1<=k<=n.
2

%I #15 Jul 12 2022 07:39:14

%S 0,2,0,6,2,0,12,6,2,0,20,12,6,2,0,30,20,12,6,2,0,42,30,20,12,6,2,0,56,

%T 42,30,20,12,6,2,0,72,56,42,30,20,12,6,2,0,90,72,56,42,30,20,12,6,2,0,

%U 110,90,72,56,42,30,20,12,6,2,0,132,110,90,72,56,42,30,20,12,6,2,0

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

%H Michel Marcus, <a href="/A095832/b095832.txt">Rows n=1..100 of triangle, flattened</a> (terms 1..1000 from Harvey P. Dale)

%e Triangle begins:

%e 0;

%e 2, 0;

%e 6, 2, 0;

%e 12, 6, 2, 0;

%e 20, 12, 6, 2, 0;

%e ...

%t Table[(n-k+1)(n-k),{n,20},{k,n}]//Flatten (* _Harvey P. Dale_, Apr 17 2016 *)

%Y Cf. A002378.

%K easy,nonn,tabl

%O 1,2

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