# A277372 (b-file synthesized from sequence entry)
0 0
1 1
2 10
3 141
4 2584
5 58745
6 1602576
7 51165205
8 1874935168
9 77644293201
10 3588075308800
11 183111507687581
12 10230243235200000
13 621111794820235849
14 40722033570202507264
15 2867494972696071121125
16 215840579093024990396416
17 17294837586403146090259745
18 1469799445329208661211021312