# A145636 (b-file synthesized from sequence entry) 1 2 2 4 3 4 4 56 5 56 6 616 7 8008 8 16016 9 816816 10 5173168 11 5173168 12 118982864 13 118982864 14 356948592 15 3450503056 16 213931189472 17 19448289952 18 58344869856 19 719586728224 20 719586728224 21 4214722265312 22 1993563631492576 23 1993563631492576