# A281595 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 1
4 10
5 125
6 1890
7 33621
8 688506
9 15958405
10 413066170
11 11810819141
12 369730963602
13 12577271147805
14 461980538087250
15 18223376862518101
16 768327068469302218
17 34480595937671194805
18 1641060381277816308810
19 82562177153973368528901
20 4378026144983797903473954