# A333160 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 4 4 6 5 8 6 17 7 36 8 146 9 1066 10 15419 11 406684 12 19284912 13 1635874946 14 249424764407 15 68725494158824 16 34418706513939926 17 31487353344361957012 18 52887877379630894268187 19 163777247316556715401451972 20 939121048579630147375554814224