# A027252 (b-file synthesized from sequence entry) 0 1 1 3 2 10 3 28 4 80 5 211 6 569 7 1455 8 3806 9 9564 10 24565 11 61080 12 155041 13 382920 14 964163 15 2370712 16 5934974 17 14548685 18 36266755 19 88711181 20 220415107 21 538305745 22 1334040167 23 3254193849 24 8047710361 25 19613210297 26 48419611161