a(n,m) tabl head (triangle) for  A104471
 
    n\m      1       2       3       4       5       6       7       8       9      10 ...

    1        1       0       0       0       0       0       0       0       0       0
    2        2       1       0       0       0       0       0       0       0       0
    3        3       4       1       0       0       0       0       0       0       0
    4        4       5       4       1       0       0       0       0       0       0
    5        5       8       8       4       1       0       0       0       0       0
    6        6       9      11       8       4       1       0       0       0       0
    7        7      12      12      15       8       4       1       0       0       0
    8        8      13      18      16      15       8       4       1       0       0
    9        9      16      19      22      21      15       8       4       1       0
   10       10      17      22      23      27      21      15       8       4       1
    .
    .
    .

 The rectangular array ay(N,m):=a(n+m-1,m) is:


    m\N      1   2   3   4   5   6   7   8   9  10  11   12   13   14   15   16   17   18   19   20 ...
   
    1        1   2   3   4   5   6   7   8   9  10  11   12   13   14   15   16   17   18   19   20 
    2        1   4   5   8   9  12  13  16  17  20  21   24   25   28   29   32   33   36   37   40     
    3        1   4   8  11  12  18  19  22  26  29  30   36   37   40   44   47   48   54   55   58
    4        1   4   8  15  16  22  23  30  34  37  38   48   49   52   56   63   64   70   71   78
    5        1   4   8  15  21  27  28  35  39  47  48   58   59   62   71   78   79   85   86   98
    6        1   4   8  15  21  33  34  41  45  53  54   70   71   74   83   90   91  103  104  116
    7        1   4   8  15  21  33  41  48  52  60  61   77   78   88   97  104  105  117  118  130 
    8        1   4   8  15  21  33  41  56  60  68  69   85   86   96  105  120  121  133  134  146
    9        1   4   8  15  21  33  41  56  69  77  78   94   95  105  114  129  130  151  152  164
   10        1   4   8  15  21  33  41  56  69  87  88  104  105  115  124  139  140  161  162  184
    .
    .
    .

The sequence for N=m is the sequence A024916(N): 

[1, 4, 8, 15, 21, 33, 41, 56, 69, 87, 99, 127, 141, 165, 189, 220, 238, 277, 297, 339,...] 

and the entries for N>m are the same as for N=m, namely A024916(N).

The triangle with the repeated numbers omitted is given in  A104472.