# A217483 (b-file synthesized from sequence entry) 0 1 1 2 2 15 3 132 4 1565 5 22918 6 400939 7 8160008 8 189453369 9 4942271754 10 143128015943 11 4556517918604 12 158167223290453 13 5945611873120910 14 240619359452963427 15 10430922482219093520 16 482234053313600047217 17 23683786738296923795986