# A375632 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 9 4 28 5 122 6 624 7 3523 8 22824 9 170948 10 1422664 11 12856373 12 126598036 13 1358773886 14 15721899652 15 194356158823 16 2560950546576 17 35899907132872 18 533099244285136 19 8351271711094697 20 137675784924101596 21 2383758487476054242 22 43244905386257120044