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A302547 as a simple table

na(n)
00
11
22
34
411
533
6131
7516
82810
912934
1097870
11447940
125308112
1316394116
14450505844
15-315178912
1660774618672
17-394330113648
1812662225550288
19-157622647720032
203766647294946944
21-64679214198647520
221475157821754785184
23-30431206030329719424
24719032203373502252160

[0,1,2,4,11,33,131,516,2810,12934,97870,447940,
 5308112,16394116,450505844,-315178912,60774618672,
 -394330113648,12662225550288,-157622647720032,
 3766647294946944,-64679214198647520,
 1475157821754785184,-30431206030329719424,
 719032203373502252160]