# A347768 (b-file synthesized from sequence entry) 1 1 2 1 3 8 4 80 5 1568 6 42308 7 1632544 8 82377984 9 5340729728 10 429905599744 11 42164608801024 12 4944386388782080 13 683353973472423936 14 109907353260811403520 15 20352830852731108528128 16 4299139435513999926820864 17 1027450150728092835655335936 18 275824741022588671077713641472