# A155603 (b-file synthesized from sequence entry) 0 1 1 7 2 33 3 151 4 705 5 3367 6 16353 7 80311 8 397185 9 1972807 10 9824673 11 49005271 12 244672065 13 1222297447 14 6108298593 15 30531927031 16 152630937345 17 763068593287 18 3815084686113 19 19074648589591 20 95370918425025 21 476847618556327