# A099515 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 13 4 31 5 78 6 190 7 469 8 1150 9 2825 10 6933 11 17015 12 41754 13 102454 14 251393 15 616826 16 1513453 17 3713389 18 9111087 19 22354678 20 54848638 21 134574493 22 330186518 23 810131889 24 1987705301 25 4876948743 26 11965871650 27 29358946070 28 72033839657