# A168851 (b-file synthesized from sequence entry) 0 1 1 30 2 870 3 25230 4 731670 5 21218430 6 615334470 7 17844699630 8 517496289270 9 15007392388830 10 435214379276070 11 12621216999006030 12 366015292971174870 13 10614443496164071230 14 307818861388758065670 15 8926746980273983904430