# A126402 (b-file synthesized from sequence entry) 0 1 1 15 2 69 3 325 4 1543 5 7361 6 35223 7 168899 8 811105 9 3899407 10 18761375 11 90319881 12 434998065 13 2095690739 14 10098729091 15 48672013183 16 234609419433 17 1130969299775 18 5452365150693 19 26286944474683 20 126739125460983