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A278748 as a simple table

na(n)
02
10
22
3-8
4-90
5520
6-566
750904
8396710
9-18390200
10131511978
11-3005766632
1233380803270
131757150970120
14-44857682845174
15950900072932696
16-28165020555314970
17-73025855982929720
1824480067437941915242
19-834839712703258127208
2034458996334508149067270
21-773502135061735864720760
22-12427737319809527785823286
231295375801958445816867049944
24-74746823183505251943756410330
253392808342679593497307739258440

[2,0,2,-8,-90,520,-566,50904,396710,-18390200,
 131511978,-3005766632,33380803270,1757150970120,
 -44857682845174,950900072932696,
 -28165020555314970,-73025855982929720,
 24480067437941915242,-834839712703258127208,
 34458996334508149067270,-773502135061735864720760,
 -12427737319809527785823286,
 1295375801958445816867049944,
 -74746823183505251943756410330,
 3392808342679593497307739258440]