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%I #7 Jul 21 2015 04:49:12
%S 0,0,1,0,1,2,0,0,1,3,0,0,1,2,4,0,0,1,2,3,5,0,0,1,2,3,4,6,0,0,1,1,2,4,
%T 5,7,0,0,0,1,2,3,4,6,8,0,0,0,1,2,3,4,5,7,9,0,0,0,1,2,3,4,5,6,8,10,0,0,
%U 0,1,1,2,3,4,6,7,9,11,0,0,0,1,1,2,3,4,5,7,8,10,12,0,0,0,1,1,2,3,4,5,6,8,9
%N Triangle read by rows for floor(j^2 / n) with n >= 2 and 1<=j<n.
%e Part of the triangle from which the sequence is constructed is shown below.
%e .....j..1..2..3..4..5..6..7..8..9.10.11.12.13.14
%e ...n
%e ...2....0
%e ...3....0..1
%e ...4....0..1..2
%e ...5....0..0..1..3
%e ...6....0..0..1..2..4
%e ...7....0..0..1..2..3..5
%e ...8....0..0..1..2..3..4..6
%e ...9....0..0..1..1..2..4..5..7
%e ..10....0..0..0..1..2..3..4..6..8
%e ..11....0..0..0..1..2..3..4..5..7..9
%e ..12....0..0..0..1..2..3..4..5..6..8.10
%e ..13....0..0..0..1..1..2..3..4..6..7..9.11
%e ..14....0..0..0..1..1..2..3..4..5..7..8.10.12
%e ..15....0..0..0..1..1..2..3..4..5..6..8..9.11.13
%o (PARI) T(n,j)=j^2\n \\ _Charles R Greathouse IV_, Jan 16 2012
%Y A165974 is contained in this sequence.
%Y Cf. A166381 (column sums), A166375 (row sums).
%K nonn,easy,tabl
%O 2,6
%A _Christopher Hunt Gribble_, Oct 13 2009. Offset corrected Oct 18 2009.
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