# A274266 (b-file synthesized from sequence entry)
1 1
2 5
3 11
4 6
5 -6
6 12
7 -36
8 144
9 -720
10 4320
11 -30240
12 241920
13 -2177280
14 21772800
15 -239500800
16 2874009600
17 -37362124800
18 523069747200
19 -7846046208000
20 125536739328000
21 -2134124568576000
22 38414242234368000
23 -729870602452992000
24 14597412049059840000