# A296163 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 22 4 105 5 501 6 2456 7 12160 8 60801 9 306130 10 1550255 11 7887034 12 40281720 13 206405967 14 1060602800 15 5463059772 16 28199365873 17 145832364580 18 755420838614 19 3918935839970 20 20357605331355 21 105878815699042 22 551273881133750 23 2873161931172668 24 14988243880188600