# A188498 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 3 4 8 5 30 6 102 7 308 8 905 9 2744 10 8473 11 26112 12 79924 13 244204 14 747160 15 2288521 16 7009458 17 21461803 18 65704200 19 201162258 20 615922714 21 1885853660 22 5774072225 23 17678809840 24 54128358209 25 165728860112 26 507424764216 27 1553620027784 28 4756831354752