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A140505 as a simple table

na(n)
02
1-1
24
30
412
54
644
720
8172
984
10684
11340
122732
131364
1410924
155460
1643692
1721844
18174764
1987380
20699052
21349524
222796204
231398100
2411184812
255592404
2644739244
2722369620
28178956972
2989478484
30715827884
31357913940
322863311532
331431655764
3411453246124

[2,-1,4,0,12,4,44,20,172,84,684,340,2732,1364,
 10924,5460,43692,21844,174764,87380,699052,349524,
 2796204,1398100,11184812,5592404,44739244,
 22369620,178956972,89478484,715827884,357913940,
 2863311532,1431655764,11453246124]