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Triangular array read by rows: T(n,k) = A337655(n) * A337655(k), for 1 <= k <= n.
8

%I #14 Oct 05 2020 02:01:59

%S 1,2,4,5,10,25,7,14,35,49,15,30,75,105,225,22,44,110,154,330,484,31,

%T 62,155,217,465,682,961,50,100,250,350,750,1100,1550,2500,68,136,340,

%U 476,1020,1496,2108,3400,4624,90,180,450,630,1350,1980,2790,4500,6120,8100

%N Triangular array read by rows: T(n,k) = A337655(n) * A337655(k), for 1 <= k <= n.

%C This is the lower triangular part of the multiplication table from A337655, read by rows.

%H Peter Kagey, <a href="/A337661/b337661.txt">Table of n, a(n) for n = 1..10011</a> (first 141 rows, flattened)

%e The multiplication table from A337655 begins:

%e 1, 2, 5, 7, 15, 22, 31, 50, 68, 90, ...

%e 2, 4, 10, 14, 30, 44, 62, 100, 136, 180, ...

%e 5, 10, 25, 35, 75, 110, 155, 250, 340, 450, ...

%e 7, 14, 35, 49, 105, 154, 217, 350, 476, 630, ...

%e 15, 30, 75, 105, 225, 330, 465, 750, 1020, 1350, ...

%e 22, 44, 110, 154, 330, 484, 682, 1100, 1496, 1980, ...

%e 31, 62, 155, 217, 465, 682, 961, 1550, 2108, 2790, ...

%e 50, 100, 250, 350, 750, 1100, 1550, 2500, 3400, 4500, ...

%e 68, 136, 340, 476, 1020, 1496, 2108, 3400, 4624, 6120, ...

%e 90, 180, 450, 630, 1350, 1980, 2790, 4500, 6120, 8100, ...

%e ...

%Y Cf. A337655, A337659, A337660, A337662.

%K nonn,tabl

%O 1,2

%A _N. J. A. Sloane_, Oct 03 2020