# A024729 (b-file synthesized from sequence entry) 1 1 2 1 3 5 4 5 5 5 6 5 7 30 8 55 9 80 10 230 11 530 12 1080 13 2505 14 5555 15 13755 16 31330 17 71405 18 168605 19 403830 20 947180 21 2199905 22 5189130 23 12724755 24 30313630 25 71503880 26 171244630 27 421182405 28 1012930055 29 2420011955 30 5834077855 31 14434795655 32 34963583830