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A009052 as a simple table

na(n)
01
10
2-12
3240
4-2352
5-136320
615140928
7-971093760
828387408128
94688909905920
10-1262963768650752
11191995869733662720
12-17544464368915034112
13-1212607904700871311360
141171249187182930708021248

[1,0,-12,240,-2352,-136320,15140928,-971093760,
 28387408128,4688909905920,-1262963768650752,
 191995869733662720,-17544464368915034112,
 -1212607904700871311360,1171249187182930708021248]