# A245112 (b-file synthesized from sequence entry) 0 1 1 2 2 18 3 224 4 3230 5 50688 6 840420 7 14483456 8 256856886 9 4656988160 10 85929839996 11 1608379269120 12 30463651429484 13 582796191989760 14 11245047027447240 15 218581150665277440 16 4276257634911525670 17 84135742205488791552 18 1663738200769421021580 19 33047906167191995678720