# A027439 (b-file synthesized from sequence entry) 0 1 1 4 2 11 3 27 4 65 5 158 6 388 7 957 8 2362 9 5827 10 14369 11 35427 12 87344 13 215348 14 530953 15 1309104 16 3227695 17 7958119 18 19621313 19 48377742 20 119278760 21 294090269 22 725100502 23 1787786943 24 4407916069 25 10868031067