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A357246 as a simple table

na(n)
01
11
2-2
35
4-49
5497
6-6926
7116510
8-2325422
953538315
10-1397740279
1140792008435
12-1316056239994
1346509292766172
14-1786748828967402
1574139054468535061
16-3304409577659864305
17157444695280699565069
18-7986085592316390890618
19429645521271113815480246

[1,1,-2,5,-49,497,-6926,116510,-2325422,53538315,
 -1397740279,40792008435,-1316056239994,
 46509292766172,-1786748828967402,
 74139054468535061,-3304409577659864305,
 157444695280699565069,-7986085592316390890618,
 429645521271113815480246]