# A090576 (b-file synthesized from sequence entry) 0 1 1 4 2 12 3 40 4 128 5 412 6 1251 7 4026 8 12362 9 39624 10 120012 11 379132 12 1130914 13 3530916 14 10402781 15 32112656 16 93427431