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A105227 as a simple table

na(n)
01
11
23
312
460
5355
62380
717430
8134190
91027656
106922146
1121248073
12-601744143
13-20802115620
14-480211746300
15-9737801866650
16-183103121602830
17-3185750996194910
18-48580593174777092
19-515943195216679230
203196232280583478136
21460669417734237239892

[1,1,3,12,60,355,2380,17430,134190,1027656,
 6922146,21248073,-601744143,-20802115620,
 -480211746300,-9737801866650,-183103121602830,
 -3185750996194910,-48580593174777092,
 -515943195216679230,3196232280583478136,
 460669417734237239892]