# A126489 (b-file synthesized from sequence entry) 0 1 1 21 2 135 3 889 4 5903 5 39389 6 263647 7 1768457 8 11880131 9 79895207 10 537729241 11 3621234957 12 24396753479 13 164414536077 14 1108268954317 15 7471720473245 16 50378750794147 17 339712511249557 18 2290882896563443 19 15449485988902675