# A351825 (b-file synthesized from sequence entry) 0 0 1 0 2 2 3 6 4 36 5 260 6 2190 7 21042 8 226856 9 2709576 10 35491770 11 505620830 12 7780224012 13 128555409996 14 2269569526406 15 42625044254730 16 848404205856720 17 17836074466842512 18 394872870912995826 19 9181542826326252726 20 223680717959853460340 21 5697036951307194432660 22 151396442683371572351742