# A123014 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 1 4 1 5 25 6 145 7 1225 8 7105 9 28945 10 165025 11 4675825 12 62610625 13 961986025 14 10237051825 15 76785333625 16 824649450625 17 30519166302625 18 643373556450625 19 14253164811510625 20 221377260570090625 21 2460131161228365625 22 39063024216812220625 23 1791544805630470515625