# A077503 (b-file synthesized from sequence entry) 1 1 2 25 3 324 4 4096 5 50176 6 600625 7 7001316 8 80013025 9 900000000 10 1000014129 11 11000024161 12 120000580921 13 1300001310976 14 14000004588964 15 150000007007601 16 1600000000000000 17 17000000233634401 18 180000000244436761