# A055936 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 11 4 33 5 87 6 259 7 730 8 2150 9 6278 10 18622 11 55340 12 165857 13 498907 14 1509012 15 4581570 16 13967031 17 42722777 18 131110259 19 403527667 20 1245358416 21 3852965298 22 11948207174 23 37131355170 24 115623660978 25 360712069084 26 1127276560366