# A377502 (b-file synthesized from sequence entry) 3 6 4 24 5 120 6 12 7 28 8 96 9 252 10 600 11 1364 12 3048 13 6552 14 13804 15 29040 16 59520 17 122400 18 248472 19 504868 20 1017840 21 2054388 22 4126100 23 8294444 24 16628160 25 33349800 26 66784536