# A367216 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 5 4 10 5 20 6 40 7 82 8 169 9 348 10 716 11 1471 12 3016 13 6171 14 12605 15 25710 16 52370 17 106539 18 216470 19 439310 20 890550 21 1803415 22 3648557 23 7375141 24 14896184 25 30065129 26 60639954 27 122231740 28 246239551