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A276688 as a simple table

na(n)
00
10
21
38
45
5-220
61895
7-9140
8-302175
9-2778300
10-95631825
11-10071428100
12-236788407375
1357706241794500
14-7412904844112625
15525300693117661500
16348922898045520800625
1755166584329677385922500
1828368558145043150339199375
1946873210124734003815040957500

[0,0,1,8,5,-220,1895,-9140,-302175,-2778300,
 -95631825,-10071428100,-236788407375,
 57706241794500,-7412904844112625,
 525300693117661500,348922898045520800625,
 55166584329677385922500,
 28368558145043150339199375,
 46873210124734003815040957500]