# A368763 (b-file synthesized from sequence entry) 0 1 1 2 2 8 3 34 4 156 5 815 6 4946 7 34706 8 277768 9 2500077 10 25000990 11 275011176 12 3300134476 13 42901748643 14 600624481562 15 9009367224110 16 144149875586576 17 2450547884972761 18 44109861929510838 19 838087376660707252 20 16761747533214146580 21 351996698197497079951