# A020766 (b-file synthesized from sequence entry) 0 1 1 29 2 571 3 9521 4 144907 5 2083865 6 28847827 7 388709777 8 5134091323 9 66784487561 10 858403625443 11 10928093824193 12 138039056180299 13 1732402968047417 14 21624191213455219 15 268679676312195569