# A258810 (b-file synthesized from sequence entry)
1 0
2 511
3 19682
4 262143
5 1953124
6 10077695
7 40353606
8 134217727
9 387420488
10 999999999
11 2357947690
12 5159780351
13 10604499372
14 20661046783
15 38443359374
16 68719476735
17 118587876496
18 198359290367
19 322687697778
20 511999999999
21 794280046580
22 1207269217791
23 1801152661462