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Multiplication table of A337656, read by antidiagonals.
4

%I #11 Oct 09 2020 03:36:04

%S 0,0,0,0,1,0,0,3,3,0,0,7,9,7,0,0,12,21,21,12,0,0,20,36,49,36,20,0,0,

%T 30,60,84,84,60,30,0,0,44,90,140,144,140,90,44,0,0,65,132,210,240,240,

%U 210,132,65,0,0,91,195,308,360,400,360,308,195,91,0

%N Multiplication table of A337656, read by antidiagonals.

%H Peter Kagey, <a href="/A338034/b338034.txt">Table of n, a(n) for n = 1..10011</a> (first 141 antidiagonals, flattened)

%e Multiplication table begins:

%e * | 0 1 3 7 12 20 30 44 65

%e -----+-------------------------------------

%e 0 | 0 0 0 0 0 0 0 0 0

%e 1 | 0 1 3 7 12 20 30 44 65

%e 3 | 0 3 9 21 36 60 90 132 195

%e 7 | 0 7 21 49 84 140 210 308 455

%e 12 | 0 12 36 84 144 240 360 528 780

%e 20 | 0 20 60 140 240 400 600 880 1300

%e 30 | 0 30 90 210 360 600 900 1320 1950

%e 44 | 0 44 132 308 528 880 1320 1936 2860

%e 65 | 0 65 195 455 780 1300 1950 2860 4225

%Y Cf. A337656, A337657, A338032 (addition table), A338033 (by rows).

%Y Cf. A337662, A337975, A338017.

%K nonn,tabl

%O 1,8

%A _Peter Kagey_, Oct 07 2020