# A361758 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 10 4 30 5 90 6 264 7 754 8 2106 9 5778 10 15628 11 41786 12 110678 13 290858 14 759312 15 1971042 16 5091442 17 13095586 18 33555988 19 85695978 20 218198158 21 554081146 22 1403588376 23 3547702610 24 8949110954 25 22532603954 26 56637795100 27 142141826074 28 356212187334 29 891481312842