# A099525 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 11 4 28 5 68 6 169 7 422 8 1048 9 2603 10 6472 11 16088 12 39985 13 99386 14 247036 15 614027 16 1526212 17 3793532 18 9429145 19 23436926 20 58254448 21 144796331 22 359903440 23 894570224 24 2223529441 25 5526769202 26 13737249076 27 34145086475 28 84870480556