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A075193 as a simple table

na(n)
01
1-3
24
3-7
411
5-18
629
7-47
876
9-123
10199
11-322
12521
13-843
141364
15-2207
163571
17-5778
189349
19-15127
2024476
21-39603
2264079
23-103682
24167761
25-271443
26439204
27-710647
281149851
29-1860498
303010349
31-4870847
327881196
33-12752043
3420633239
35-33385282
3654018521
37-87403803
38141422324

[1,-3,4,-7,11,-18,29,-47,76,-123,199,-322,521,
 -843,1364,-2207,3571,-5778,9349,-15127,24476,
 -39603,64079,-103682,167761,-271443,439204,
 -710647,1149851,-1860498,3010349,-4870847,7881196,
 -12752043,20633239,-33385282,54018521,-87403803,
 141422324]