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A143049 as a simple table

na(n)
01
11
2-6
3-21
4286
51281
6-20592
7-100226
81749462
98899086
10-162993402
11-852079872
1216106878320
1385783258295
14-1658113447608
15-8950840125828
16175904428301062
17959332126312266
18-19096256882857668
19-104984591307499239
202111233112316364434

[1,1,-6,-21,286,1281,-20592,-100226,1749462,
 8899086,-162993402,-852079872,16106878320,
 85783258295,-1658113447608,-8950840125828,
 175904428301062,959332126312266,
 -19096256882857668,-104984591307499239,
 2111233112316364434]