# A036618 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 4 5 9 6 20 7 47 8 111 9 269 10 650 11 1577 12 3808 13 9189 14 22079 15 52931 16 126486 17 301559 18 717129 19 1701909 20 4030658 21 9528769 22 22487287 23 52984134 24 124648730 25 292824200 26 686952007 27 1609445592 28 3765971432 29 8801379791 30 20545409197