# A064954 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 8 5 17 6 31 7 64 8 122 9 240 10 485 11 982 12 1961 13 3932 14 7898 15 15820 16 31729 17 63576 18 127354 19 255162 20 511014 21 1023398 22 2049132 23 4102601 24 8213244