login

A157876 as a simple table

na(n)
01
1-1
21
3-1
41
5-2
62
7-3
84
9-6
109
11-12
1217
13-22
1430
15-40
1654
17-74
18100
19-138
20188
21-258
22352
23-479
24653
25-887
261209
27-1645
282242
29-3056
304165
31-5680
327740
33-10551
3414376
35-19589
3626692
37-36368
3849560
39-67532
4092032
41-125416
42170912
43-232912
44317392

[1,-1,1,-1,1,-2,2,-3,4,-6,9,-12,17,-22,30,-40,54,
 -74,100,-138,188,-258,352,-479,653,-887,1209,
 -1645,2242,-3056,4165,-5680,7740,-10551,14376,
 -19589,26692,-36368,49560,-67532,92032,-125416,
 170912,-232912,317392]