cp's OEIS Frontend

A338033 Triangular array read by rows: T(n,k) = A337656(n) * A337656(k) for 1 <= k <= n.

%I A338033 #13 Oct 09 2020 03:36:01
%S A338033 0,0,1,0,3,9,0,7,21,49,0,12,36,84,144,0,20,60,140,240,400,0,30,90,210,
%T A338033 360,600,900,0,44,132,308,528,880,1320,1936,0,65,195,455,780,1300,
%U A338033 1950,2860,4225,0,91,273,637,1092,1820,2730,4004,5915,8281
%N A338033 Triangular array read by rows: T(n,k) = A337656(n) * A337656(k) for 1 <= k <= n.
%H A338033 Peter Kagey, <a href="/A338033/b338033.txt">Table of n, a(n) for n = 1..10011</a> (first 141 rows, flattened)
%e A338033 Multiplication table begins:
%e A338033    * | 0  1   3   7  12   20   30   44   65
%e A338033 -----+-------------------------------------
%e A338033    0 | 0
%e A338033    1 | 0  1
%e A338033    3 | 0  3   9
%e A338033    7 | 0  7  21  49
%e A338033   12 | 0 12  36  84 144
%e A338033   20 | 0 20  60 140 240  400
%e A338033   30 | 0 30  90 210 360  600  900
%e A338033   44 | 0 44 132 308 528  880 1320 1936
%e A338033   65 | 0 65 195 455 780 1300 1950 2860 4225
%Y A338033 Cf. A337656, A337657, A338031 (addition), A338034 (by antidiagonals).
%Y A338033 Cf. A337661, A337974, A338016.
%K A338033 nonn,tabl
%O A338033 1,5
%A A338033 _Peter Kagey_, Oct 07 2020