# A011753 (b-file synthesized from sequence entry) 1 11 2 20 3 30 4 420 5 5460 6 60060 7 746130 8 80059980 9 900029130 10 10407767370 11 1100869379610 12 12026713528830 13 1300912477633230 14 14299762385778870 15 1502172599891453490 16 160000041334479776430 17 17000158733027932351890