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A137338 as a simple table

na(n)
11
2-1
31
40
5-3
61
73
86
9-6
101
11-12
12-9
1326
14-10
151
1645
173
18-109
1971
20-15
211
22-198
2381
24501
25-475
26155
27-21
281
291071
30-786
31-2663
323329
33-1455
34295
35-28
361
37-6984
386711
3916510
40-25495
4113729
42-3647
43511
44-36
451
4653217
47-60309
48-117912
49216004
50-135961
5143897
52-7994
53826
54-45
551
56-462330
57589197
58953711

[1,-1,1,0,-3,1,3,6,-6,1,-12,-9,26,-10,1,45,3,-109,
 71,-15,1,-198,81,501,-475,155,-21,1,1071,-786,
 -2663,3329,-1455,295,-28,1,-6984,6711,16510,
 -25495,13729,-3647,511,-36,1,53217,-60309,-117912,
 216004,-135961,43897,-7994,826,-45,1,-462330,
 589197,953711]