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A368970 as a simple table

na(n)
01
12
27
328
4121
5546
62531
711934
856867
9272580
101309505
116285630
1230057195
13142754008
14671062828
153108766166
1614108600499
1762170980416
18262108536781
191027886900446
203509371721163
218204350476210
22-12172347463045
23-361684831407060
24-3497893818262311

[1,2,7,28,121,546,2531,11934,56867,272580,1309505,
 6285630,30057195,142754008,671062828,3108766166,
 14108600499,62170980416,262108536781,
 1027886900446,3509371721163,8204350476210,
 -12172347463045,-361684831407060,
 -3497893818262311]