# A056455 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 0 7 24 8 24 9 240 10 240 11 1560 12 1560 13 8400 14 8400 15 40824 16 40824 17 186480 18 186480 19 818520 20 818520 21 3498000 22 3498000 23 14676024 24 14676024 25 60780720 26 60780720 27 249401880 28 249401880 29 1016542800 30 1016542800 31 4123173624 32 4123173624 33 16664094960 34 16664094960