# A016831 (b-file synthesized from sequence entry)
0 128
1 279936
2 10000000
3 105413504
4 612220032
5 2494357888
6 8031810176
7 21870000000
8 52523350144
9 114415582592
10 230539333248
11 435817657216
12 781250000000
13 1338925209984
14 2207984167552
15 3521614606208
16 5455160701056
17 8235430000000
18 12151280273024
19 17565568854912
20 24928547056768