# A058855 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 8 4 22 5 52 6 142 7 362 8 973 9 2574 10 6935 11 18643 12 50573 13 137401 14 375306 15 1027898 16 2825831 17 7790055 18 21539352 19 59706865 20 165921896 21 462127857 22 1289901083 23 3607567539 24 10108555623 25 28374358327 26 79777757405 27 224653284863