# A337833 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 57 4 182 5 3124 6 1068 7 32318 8 390624 9 280182 10 3626068 11 23157318 12 120813568 13 1220703124 14 1097376068 15 11109655182 16 49925501068 17 762939453124 18 355101282318 19 19073486328124 20 15613890344818 21 365855836217682 22 2384185791015624