# A077612 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 12 5 48 6 720 7 4320 8 60480 9 483840 10 7257600 11 72576000 12 1197504000 13 14370048000 14 261534873600 15 3661488230400 16 73229764608000 17 1171676233728000 18 25609494822912000 19 460970906812416000 20 10948059036794880000 21 218961180735897600000 22 5620003638888038400000