# A327541 (b-file synthesized from sequence entry) 1 1 2 4 3 16 4 72 5 271 6 1024 7 3809 8 13968 9 50992 10 185364 11 672079 12 2433024 13 8798609 14 31797532 15 114864976 16 414821664 17 1497814207 18 5407599616 19 19521754897 20 70471314792 21 254385558128 22 918256161068 23 3314588702303 24 11964424716288 25 43186863073121