# A370608 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 10 5 25 6 156 7 721 8 5356 9 40881 10 366850 11 3628801 12 40048086 13 479001601 14 6228391456 15 87184121025 16 1307724593176 17 20922789888001 18 355689166978146 19 6402373705728001 20 121645161595446490 21 2432902128489747201 22 51090943465394571376 23 1124000727777607680001