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A370141 as a simple table

na(n)
11
2-2
34
4-8
514
6-22
728
8-14
9-80
10420
11-1430
124128
13-10798
1426176
15-59114
16123442
17-232240
18365888
19-355616
20-475892
214318112
22-17471288
2356635490
24-163101656
25432173038
26-1067080032
272456709054
28-5216642696
299906435640
30-15415122000
3112937725806
3233034018944
33-238942986520

[1,-2,4,-8,14,-22,28,-14,-80,420,-1430,4128,
 -10798,26176,-59114,123442,-232240,365888,-355616,
 -475892,4318112,-17471288,56635490,-163101656,
 432173038,-1067080032,2456709054,-5216642696,
 9906435640,-15415122000,12937725806,33034018944,
 -238942986520]