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A231530 as a simple table

na(n)
01
11
21
30
4-10
5-90
6-730
7-6160
8-55900
9-549900
10-5864300
11-67610400
12-839594600
13-11186357000
14-159300557000
15-2416003824000
16-38894192662000
17-662595375078000
18-11911522255750000
19-225382826562400000
20-4477959179352100000
21-93217812901913700000
22-2029107997508660900000

[1,1,1,0,-10,-90,-730,-6160,-55900,-549900,
 -5864300,-67610400,-839594600,-11186357000,
 -159300557000,-2416003824000,-38894192662000,
 -662595375078000,-11911522255750000,
 -225382826562400000,-4477959179352100000,
 -93217812901913700000,-2029107997508660900000]