# A036623 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 4 5 9 6 20 7 47 8 107 9 249 10 573 11 1319 12 3010 13 6859 14 15534 15 35095 16 78964 17 177209 18 396434 19 884767 20 1969496 21 4374573 22 9694994 23 21443195 24 47333594 25 104291391 26 229373393 27 503609582 28 1103877079 29 2415752264 30 5278467730