# A176749 (b-file synthesized from sequence entry) 0 1 1 3 2 5 3 18 4 65 5 262 6 1093 7 4731 8 20979 9 94930 10 436451 11 2033321 12 9577653 13 45538184 14 218263593 15 1053456780 16 5115724797 17 24977183908 18 122537039845 19 603755499411 20 2986339566083 21 14823218200440 22 73813096856015 23 368631268757920