# A274270 (b-file synthesized from sequence entry)
1 1
2 9
3 47
4 154
5 274
6 120
7 -120
8 240
9 -720
10 2880
11 -14400
12 86400
13 -604800
14 4838400
15 -43545600
16 435456000
17 -4790016000
18 57480192000
19 -747242496000
20 10461394944000
21 -156920924160000
22 2510734786560000
23 -42682491371520000
24 768284844687360000
25 -14597412049059840000