# A259856 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 2 5 2 6 4 7 18 8 48 9 96 10 194 11 398 12 992 13 2614 14 6496 15 15512 16 37536 17 92366 18 231544 19 583442 20 1464452 21 3680362 22 9310622