# A090158 (b-file synthesized from sequence entry)
0 1
1 0
2 -3
3 9
4 -15
5 15
6 -63
7 399
8 -255
9 -7425
10 -1023
11 355839
12 -4095
13 -22360065
14 -16383
15 1903790079
16 -65535
17 -209865211905
18 -262143
19 29088885637119
20 -1048575
21 -4951498051026945
22 -4194303
23 1015423886515240959
24 -16777215
25 -246921480190174429185