# A001228 (b-file synthesized from sequence entry) 1 7920 2 95040 3 175560 4 443520 5 604800 6 10200960 7 44352000 8 50232960 9 244823040 10 898128000 11 4030387200 12 145926144000 13 448345497600 14 460815505920 15 495766656000 16 42305421312000 17 64561751654400 18 273030912000000 19 51765179004000000 20 90745943887872000 21 4089470473293004800 22 4157776806543360000 23 86775571046077562880 24 1255205709190661721292800 25 4154781481226426191177580544000000 26 808017424794512875886459904961710757005754368000000000