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A337974 Triangular array read by rows: T(n,k) = A337946(n) * A337946(k), for 1 <= k <= n.

%I A337974 #18 Oct 09 2020 17:19:30
%S A337974 1,3,9,7,21,49,12,36,84,144,22,66,154,264,484,30,90,210,360,660,900,
%T A337974 47,141,329,564,1034,1410,2209,61,183,427,732,1342,1830,2867,3721,85,
%U A337974 255,595,1020,1870,2550,3995,5185,7225,113,339,791,1356,2486,3390,5311,6893,9605,12769
%N A337974 Triangular array read by rows: T(n,k) = A337946(n) * A337946(k), for 1 <= k <= n.
%C A337974 This sequence, A337947, and A337972 partition the positive integers.
%H A337974 Peter Kagey, <a href="/A337974/b337974.txt">Table of n, a(n) for n = 1..10011</a> (first 141 rows, flattened)
%e A337974 Multiplication table for A337946 begins:
%e A337974   *  |  1   3   7   12   22   30   47   61   85
%e A337974 -----+-----------------------------------------
%e A337974    1 |  1
%e A337974    3 |  3   9
%e A337974    7 |  7  21  49
%e A337974   12 | 12  36  84  144
%e A337974   22 | 22  66 154  264  484
%e A337974   30 | 30  90 210  360  660  900
%e A337974   47 | 47 141 329  564 1034 1410 2209
%e A337974   61 | 61 183 427  732 1342 1830 2867 3721
%e A337974   85 | 85 255 595 1020 1870 2550 3995 5185 7225
%Y A337974 Cf. A337661, A337946, A338016, A338033.
%Y A337974 Cf. A337972 (addition table), A337975 (read by antidiagonals).
%K A337974 nonn,tabl
%O A337974 1,2
%A A337974 _Peter Kagey_, Oct 05 2020