# A149575 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 13 4 65 5 209 6 1045 7 3729 8 18645 9 70717 10 353585 11 1395805 12 6979025 13 28339645 14 141698225 15 587614085 16 2938070425 17 12383615985 18 61918079925 19 264376635889 20 1321883179445 21 5704016489345 22 28520082446725 23 124149831843401 24 620749159217005 25 2722238024497961 26 13611190122489805 27 60069831193045649