# A154731 (b-file synthesized from sequence entry) 1 4 2 18 3 180 4 2028 5 8820 6 34848 7 108288 8 191748 9 720900 10 875520 11 960498 12 990000 13 1355310 14 1629108 15 1713600 16 1756920 17 2334948 18 2609028 19 7376850 20 8448048 21 21639798 22 37148148 23 42023088 24 48893940 25 60544008 26 63840000 27 100328400