# A356885 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 3 4 -4 5 30 6 954 7 6300 8 6432 9 424872 10 18273960 11 260682840 12 1754408424 13 47063118960 14 2314149100704 15 54798086299320 16 773632032345600 17 20746972036284480 18 1072205580591921600 19 36098491880448944640 20 816375193722964932480 21 25160238159364392336000