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A292950 as a simple table

na(n)
01
10
20
30
40
51
6-6
721
8-56
9126
10-126
11-2310
1232472
13-287001
142016014
15-11978967
1658518096
17-159272932
18-1367358552
1933638536548
20-450849366456
214857267575853
22-44901867052350
23349150315551037
24-1912043403523176
25-2260563011376054

[1,0,0,0,0,1,-6,21,-56,126,-126,-2310,32472,
 -287001,2016014,-11978967,58518096,-159272932,
 -1367358552,33638536548,-450849366456,
 4857267575853,-44901867052350,349150315551037,
 -1912043403523176,-2260563011376054]